Triple berry pie might just become your new favorite dessert. It’s fresh, fruity, and perfect for any season, be it summer or fall – or any time of the year!

Instead of going for a traditional lattice topping, we went with a chunky crumb topping. we love how it transformed the pie into a bit of a cobbler recipe – two of our favorite desserts in one!

Why we love it:

  • Simple filling. This easy-to-make minimalist filling allows the sweet and tart flavors of the berries to shine.
  • Freeze for later. Fruit pies freeze very well for convenient storage and reheating, enjoy fresh berries all year long!
  • A tasty twist. Fresh berry pie is a cross between a Blueberry Cobbler and a pie. The chunky crumb topping adds a delightful crunch.

Table of Contents

Ingredients

Filling

  • 2 cups blackberries fresh or frozen
  • 2 cups blueberries fresh or frozen
  • 2 cups raspberries fresh or frozen
  • ½ cup granulated sugar
  • ⅓ cup all purpose flour 
  • 1 tablespoon cornstarch if using frozen berries increase the amount of cornstarch to 1½– 2 tablespoons
  • 1 tablespoon lemon juice
  • 1 tablespoon lemon zest How to Zest a Lemon
  • 1 teaspoon vanilla extract 

Topping

  • 1 cup old-fashioned oats
  • ¾ cup brown sugar – light or dark brown sugar
  • ½ cup all purpose flour
  • 1 teaspoon cinnamon
  • ¼ teaspoon salt
  • 9 tablespoons unsalted butter, cold and cubed

Crust

How to Make Berry Pie

  1. PREP. Preheat oven to 400°F.
  2. BERRIES. In a large mixing bowl combine 2 cups each of blackberries, blueberries, raspberries, ½ cup sugar, ⅓ cup flour, 1 tablespoon cornstarch, 1 tablespoon lemon juice, 1 tablespoon lemon zest, and 1 teaspoon vanilla.
    • Toss to combine, until evenly coated. Chill in the refrigerator until needed.
  3. CRUMBLE. In a medium mixing bowl, combine 1 cup oats, ¾ cup brown sugar, ½ cup flour, 1 teaspoon cinnamon, and ¼ teaspoon salt. Using a pastry blender, cut in 9 tablespoons butter until pea-size clumps form. Place in refrigerator until needed.
  4. CRUST. Roll out Homemade Pie Crust into a 9-inch pie plate. Press gently into the bottom of the pan. Flute the edge, or crimp using a fork.
  5. BAKE. Add pie filling, then sprinkle the oat flour mixture on top of the pie filling. Bake for 30 minutes.
    • Cover with foil, and continue baking for 20-25 minutes. Tent the foil at the 45-minute mark to prevent the crust and topping from getting too brown.
  6. SERVE. Remove from the oven and allow the pie to cool at room temperature for 2½ hours or at room temperature for 1 hour, then 1 hour in the refrigerator before serving.
Close up image of triple berry pie in glass dish pan.

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4.92 from 75 votes

Triple Berry Pie

This easy-to-make fresh and fruity berry pie has a crumb topping for a delicious dessert that can be enjoyed all year round!
Servings: 12
Prep: 30 minutes
Cook: 1 hour
Total: 1 hour 30 minutes

Ingredients 

For the filling:

  • 2 cups blackberries
  • 2 cups blueberries
  • 2 cups raspberries
  • ½ cup sugar
  • cup all-purpose flour
  • 1 tablespoon cornstarch
  • 1 tablespoon lemon juice
  • 1 tablespoon lemon zest
  • 1 teaspoon vanilla extract

For the topping:

  • 1 cup old-fashioned oats
  • ¾ cup brown sugar
  • ½ cup all-purpose flour
  • 1 teaspoon cinnamon
  • ¼ teaspoon salt
  • 9 tablespoons unsalted butter, cold and cubed

For the crust:

  • 1 pie crust, homemade or store bought

Instructions 

For the Filling

  • Preheat oven to 400°F.
  • In a large mixing bowl combine 2 cups each of blackberries, blueberries, raspberries, 1/2 cup sugar, 1/3 cup flour, 1 tablespoon cornstarch, 1 tablespoon lemon juice,1 tablespoon lemon zest, and 1 teaspoon vanilla.
  • Toss to combine, until evenly coated. Chill in the refrigerator until needed.

For the Topping

  • In a medium mixing bowl, combine 1 cup oats, 3/4 cup brown sugar, 1/2 cup flour, 1 teaspoon cinnamon, and 1/4 teaspoon salt. Using a pastry blender, cut in butter until pea-size clumps form. Place in refrigerator until needed.

For the Crust

  • Roll out or place a pre-made pie crust into a 9-inch pie dish. Press gently into the bottom of the pan. Flute the edge, or crimp using a fork.
  • Add pie filling, then sprinkle the oat flour mixture on top. It will be a generous amount.
  • Bake for 30 minutes. Cover with foil and continue baking for 20-25 minutes. Tent the foil at the 45-minute mark to prevent the crust and topping from getting too brown.
  • Remove from the oven and allow the pie to cool at room temperature for 2½ hours or at room temperature for 1 hour, then 1 hour in the refrigerator before serving.

Video

Notes

STORE leftovers on the countertop, or in the refrigerator for a few days.
FREEZE baked or unbaked. Place it in the freezer, uncovered at first, to help it set. Once frozen, wrap it with plastic wrap and then double-wrap it in aluminum foil.
To reheat. Thaw baked pie in the fridge overnight, or on the countertop at room temperature before serving. No need to thaw an unbaked pie. Pop it in the oven, checking to see if it needs a few more minutes at the end of the listed baking time. Frozen fruit pies should last about 4 months.

Nutrition

Calories: 440kcal, Carbohydrates: 73g, Protein: 6g, Fat: 14g, Saturated Fat: 7g, Cholesterol: 23mg, Sodium: 106mg, Potassium: 276mg, Fiber: 8g, Sugar: 32g, Vitamin A: 395IU, Vitamin C: 24.5mg, Calcium: 60mg, Iron: 2.7mg

Nutrition information is automatically calculated, so should only be used as an approximation.

Recipe FAQ

  • To top with a pie crust, roll out a 10-12 inch round. 
  • Either use a solid top crust with venting slits or cut the dough into strips and weave them together for a lattice topping.
  • Use a shaped cookie cutter and stamp out pieces from the pie crust. Spread the shapes on top of the berries and bake. A star-shaped cookie cutter would be especially fun for the Fourth of July
  • The filling should be bubbling throughout the center and around the edges. This indicates the filling has reached a good temperature and thickened properly.
  • The crumble topping should be golden brown and crisp throughout.
  • Line a baking sheet with foil, and place it on the bottom rack while the oven is preheating. If the filling bubbles over, it will land on the baking sheet instead of making a mess on the bottom of the oven.
  • Store the leftover berry pie recipe on the countertop, or in the refrigerator for a few days.
  • Freeze the pie baked or unbaked. Place the mixed berry pie in the freezer, uncovered at first, to help it set. Once frozen, wrap it with plastic wrap and double-wrap it in aluminum foil.
    • To reheat. Thaw baked pie in the fridge overnight, or on the countertop at room temperature before serving.
    • No need to thaw an unbaked pie. Pop it in the oven, checking to see if it needs a few more minutes at the end of the listed baking time. Frozen fruit pies should last about 4 months.

About Kristyn

Kristyn Merkley is a published cookbook author, wife, mom of six, and major food enthusiast! For the past 15 years, she has been sharing foolproof, family-friendly recipes—each one tested in her kitchen—that anyone can master. As a seasoned recipe creator, she loves making cooking simple, stress-free, and totally doable for everyone!

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4.92 from 75 votes (42 ratings without comment)

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Recipe Rating




74 Comments

  1. Kerry says:

    4 stars
    Delish! I used a cinnamon graham cracker crust because that’s what I had on hand and with the brown sugar/oat topping it was a hit! I will definitely be making this again!

    1. Lil'Luna Team says:

      That sounds perfect!! I am so glad you liked it! Thank you!

  2. Hali says:

    Would they’re be anything different I would need to do if I want to use frozen fruit instead of fresh?

    1. Lil'Luna Team says:

      Nope. You can just put them right in the recipe frozen.

  3. Lauren says:

    Hi! I was going to make your triple berry pie for thanksgiving, quick question and so sorry to bother you, but do you need to pre-cook the crust? Thank you so much 💖

    1. Lil'Luna Team says:

      Oh I hope you enjoy the pie! Nope, you don’t need to pre-bake. You can put it in raw (both a homemade or premade crust will work), then add the filling on top with the oatmeal crumble.

  4. GEORGE PLOOF says:

    Excellent flavor and easy to make and even make your own from the basic ingredients. The new recipe format is perfect is clean and so easy to follow. GREAT job!

    1. Lil'Luna Team says:

      Thank you so much!! So glad to hear you enjoyed the pie + the new post format.

  5. Sue says:

    Can I substitute frozen strawberries for the raspberries ?

  6. Kay says:

    5 stars
    I do like the new layout. To get the recipe first instead of wading through a lot of waffle. I look at the ingredients first then decide if I want to make it.
    Thanks

    1. Lil'Luna Team says:

      You’re welcome!! So glad to hear you enjoy the new design.

  7. ralph says:

    i like it

  8. Nancy says:

    Like the added information and tips in the recipe. Have been a fan for several years!

    1. Lil'Luna Team says:

      Oh thank you!! So glad to hear that! Thanks for being here. 🙂

  9. PAT SHANNON says:

    5 stars
    I do like it, so much more user friendly. I agree with the other person that you don’t need to print the recipe twice. Now I can get to my favorite part first.

  10. Maria says:

    Finally, user friendly! Thank you…I am a recipe nerd, so the more info for me is greatly appreciated. If people find too much, can scroll down. I don’t have a printer, so I like your options! Many thanks ☺️

  11. Pamela Lathram says:

    3 stars
    It is better. I still feel that you don’t need to list the recipe twice. Stay with the second recipe (its more concise) and just add the extra notes on how to fix the recipe mixed in with the notes that you listed in the first recipe. I for one felt that I had to read it all from top to bottom. More time consuming. When I save a recipe I save it from the second recipe.

  12. Lidia Marques says:

    3 stars
    I do not like oats in a dessert. What do I have to change to put a regular pie crust on top or make a change to the one with oats?

  13. shelia thompson says:

    Very nice.

  14. Belle says:

    5 stars
    I couldn’t stop at one piece of this pie, it was so delish! Love the berry combo.

  15. Sha says:

    5 stars
    These are delicious and fancy! They’re also easy to make! Keeping the recipe!

  16. Dana G says:

    5 stars
    Holy cow this is AMAZING!! I need to make this again for my friend’s birthday, she loves berries!

  17. Wade L says:

    5 stars
    Just want to say Thanks!
    This is my go to recipe for triple berry pie.
    Have made this pie several times…have one in the oven now for the New Year.
    The fruit and crumble top are soo good together.
    This pie NEVER lasts longer than a day at our house, so you better get some while it’s there!

  18. Thomasita Sandoval says:

    5 stars
    This is a very delicious dessert pie! Our families favorite recipe and, of course, favorite flavor pie. We usually have pie for every party instead of cake. We all loved it!

  19. Elizabeth Smith says:

    I made with fresh fruit, not frozen. The first time it was too runny so I increased the flour to 1/2 cup. I put a lattice crust on the top because I’m not crazy about oats,and also my mom used to make lattice crusts a lot and I wanted to make this as tribute to her. Love and miss you mom!
    DELICIOUS AND SO EASY!
    Especially if you find pie making a challenge(I do)

  20. Kathy says:

    4 stars
    I made this berry recipe for our Mother’s Day dessert. I used my own crust recipe. I followed the recipe other than that. If I were to make this again, I would add a more sugar and maybe a bit of cinnamon. The pie was a bit bland in taste. The texture and consistency turned out good. Just needed something more to give it more flavor

    1. Lil'Luna Team says:

      Thanks for the feedback!! Thanks for giving the recipe a try!

  21. Vanessa says:

    5 stars
    Love! This has become our go-to dessert for special occasions. Hubby just requested it for his birthday dessert 🙂
    Made with frozen berries and Johanna Gaines homemade crust.

  22. Brandi says:

    Is the lemon juice necessary or is there a substitute that would work? I am allergic to all citrus fruits, but your recipe looks so good!

    1. Lil'Luna Team says:

      It brings out the flavors & I personally haven’t left it out, to know how it would taste if it wasn’t added. Vinegar is sometimes a substitute. Is there something you would normally use when a recipe calls for lemon juice?

      1. Brandi says:

        Usually when baking I just find a different recipe that doesn’t have it. In other cooking, I use apple cider vinegar, but wasn’t sure if the pie would still taste okay with that substitute.

      2. Pat JOHNSON says:

        5 stars
        I love this pie was easy & delicious I followed recipe was great. IDK about the people who had negative comments. Only negative comment I have is I didn’t get ice cream lol

      3. Lil'Luna Team says:

        Thank you!! I appreciate it and am so glad to hear you enjoyed the pie!

  23. Martha says:

    5 stars
    This recipe is a keeper! Made it for my friend’s birthday party and it was a huge hit! The only small change I made was substituting plant-based butter for the real butter in the crumble and in the crust so it was vegan. Everyone loved it and I already have requests to make it again!!

    1. Lil'Luna Team says:

      Hooray!! So glad to hear that the pie was a hit. Thanks for sharing that tip about making it vegan. Glad to hear the butters swapped seamlessly.

  24. Sue says:

    5 stars
    I LOVE fruity desserts and this has been on my list to make for awhile. I used your pie crust recipe and it created the best flaky crust for a fruit pie Ive ever known.

  25. Olivia says:

    5 stars
    We love fruit pies! This pie is especially good with the different combination of fruit. A great pie to make for any occasion.

  26. Olivia says:

    5 stars
    Thank you for this recipe! I made it yesterday and it was incredible. So many delicious fruity flavors packed into one pie, my family couldn’t get enough of it!

  27. Joy says:

    5 stars
    The more berries, the better!! This is my hubby’s absolute favorite!! The flavor is amazing with all the different berries combined!

  28. Melissa says:

    5 stars
    Wow – this was a huge hit with my family, great recipe.

  29. Ali L says:

    5 stars
    Amazing! I used blueberries and raspberries and everyone loved it. Thank you for this yummy recipe.

  30. ChristyJayne says:

    5 stars
    Everyone loved this and I made it as written, except I had strawberries instead of raspberries (and vegan butter). I was inspired to make the mile high berry pie by Food Network Magazine, but I thought your recipe looked better and I will definitely make it again! Thank you!

  31. Bonnie Smith says:

    5 stars
    Best pie you will ever eat !
    Love it

    1. Lil'Luna Team says:

      Thank you!! I’m so glad you enjoyed the pie!

  32. Debra D Wood says:

    I just have a question. If you use frozen berries, do you thaw them out first?

    1. Lil'Luna Team says:

      Yes, I would. You may be able to keep them frozen and just bake a little longer, but I personally would thaw them out a bit first. 🙂

      1. Wendy says:

        5 stars
        I’ve made this twice now with frozen berries that I did NOT thaw and it turned out just fine! Yes, maybe just cook it a bit longer….
        Delicious! I love the lemon zest and juice.

  33. Amy Ganden says:

    5 stars
    One of our favorite pies to make! Very easy to make. I’ve varied the berries used based on what I’ve had on hand- always works out great!

    1. Lil'Luna Team says:

      Yay! I’m so glad you enjoy this pie. Switching out the berries makes it like a new pie each time too! 😉

  34. Tracy says:

    5 stars
    This was delicious! I used blackberries and raspberries and it turned out great!

    1. Lil'Luna Team says:

      Ooh so yummy! Glad to hear you enjoyed it!

  35. Kara says:

    5 stars
    This pie is my new favorite pie! No blackberries at the store the first time I made it so I subbed in strawberries and it was just divine! Making again today but with blackberries for my daughter’s birthday (requested b/c the first pie was sooo good). Thank you!

  36. Paige bural says:

    Can i make the pie ahead of time? how do i store the pie, in the refrigerator or out on the counter?

    1. Kristyn Merkley says:

      If I were making it the morning of, I would just leave it on the counter. If I were making a day before, I would do everything until the baking step & stick in the fridge & bake before eating.

    2. Felisha says:

      Hi! Do you mean to put the top crumble all into a pastry blender with the butter until pea size lll form or just the butter?

      1. Lil'Luna Team says:

        The first one you said…. so mix the other ingredients for the crumble, then cut in the butter with those ingredients. 🙂

  37. Jane Heo says:

    5 stars
    Most amazing pie! I made it for a dinner party and even though all the guests were stuffed from dinner, they ate every last bite of their slice of pie! I topped each slice with a scoop of Vanilla ice cream. So Delicious!

    1. Kristyn Merkley says:

      Yay!! You can’t turn away dessert! Glad everyone liked it! Thank you!

  38. HolLy says:

    5 stars
    Absolutely delicious!!! We used blueberries, strawberries, and raspberries in our recipe. As soon as we Pinned this recipe and saw it was lilluna.com, we knew it was going to be A delicious recipe! We love your chocolate chIp cookies too!

    1. Kristyn Merkley says:

      Awe, that’s so nice! Thank you so much for saying that!

  39. Kayla says:

    5 stars
    This was Really good and so Simple! My four year old had a blast making and eating it 🙂

    Making this was a last minute decision and we only had margarine. if you’re not using real butter, definitely watch that you don’t over-mix and/or pop the margarine in the freezer for a bit beforehand.

    Also, we used frozen berries (thawed) with no issue 🙂

    1. Kristyn Merkley says:

      So glad! Thank you for sharing that!

  40. gAIL sTORY says:

    5 stars
    THIS RECIPE IS A KEEPER. nOT TOO SWEET NOR TOO TART. gOING INTO MY ‘FAVORITE RECIPES.’

    1. Kristyn Merkley says:

      Thank you for sharing that! I am happy that you liked it!

    2. Lisa Scott says:

      So far so good but in the dirsct im a little confUsed it said to cover with foil back 25-30 min then at the 45 mark tent the foil so topping does not get to dark so after the 25-30 minutes am i su to tent the foil and bake an additional 45 min?

      1. Lil'Luna Team says:

        This is a contributors recipe, but you would bake it for 30 minutes, then cover with 20-25 minutes, so that’s a total of about 50-55 minutes. She is saying to tent the foil at the 45 minute mark, to prevent browning. I hope that makes sense. Let me know if you have any more questions.

  41. Chacha says:

    5 stars
    Delicious

    1. Kristyn Merkley says:

      Thank you 🙂

    2. Tracy says:

      5 stars
      This was delicious! I used blackberries and raspberries and it turned out great!

  42. Mariya Diawara says:

    5 stars
    all my favorite berries combined in this wonderful recipe, thank you!

    1. Kristyn Merkley says:

      You are welcome! Thank you so much for saying that!

  43. Cheri Shope says:

    What is your crust recipe for this pie? Thanks

    1. Kristyn Merkley says:

      This one is just store bought. You could either use that or make your own crust 🙂