Cake Mix Cookie Bars

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Cake Mix Cookie Bars are a simple, quick, and delicious treat everyone will love! They are a fab option for lovers of cake and cookies.

They are quick and easy to make and even easier to devour! Thick and delicious cookies make a perfect accompaniment to milk. For more cookie goodness try Cookie Bars, 3 Ingredient Sugar Cookies, and Almond Cookies.

cake mix cookie bars

The Easiest Cookie Bars!

Hi. It’s me – Lily! Today’s recipe is for Cake Mix Cookie Bars. I think cookies are yummy, and I think cake is yummy and this recipe is those things put together.

It also has M&MS and chocolate chips which are so good. By the way, I LOVE M&Ms but not as much as Milky Ways. 😉 This recipe was really simple and delicious, and I think you’ll like it.

It’s especially easy because you use a box of cake mix instead of having to put together ingredients from scratch.

cake mix boxes

How to Make Them

PREP. Preheat oven to 350.

MIX. In a large bowl combine cake mix, pudding, water, oil and eggs using a mixer. Mix until well combined. Fold in chocolate chips and ½ cup mini M&Ms.

BAKE. Pour into a greased 9×13 pan. Sprinkle with remaining M&Ms. Bake for 24-28 minutes or until golden brown on the edges.

Recipe Notes:

  • Use ONLY the cake mix and the pudding powder. DO NOT add the other ingredients from the box that you normally would.
  • Use instant pudding mix. A small box is 3.4 oz. 
  • Glass pan: Glass pans take longer to heat up and distribute the heat through your batter. They also hold onto heat for much longer than metal pans. If using a glass pan, lower the oven temperature by 25°F from what the recipe calls for, and bake 10 minutes longer or until a toothpick inserted into the center comes out clean.
  • Different brands of cake mixes may have slightly different baking instructions. Refer to the cake mix box for guidance in oven temperature and bake times.
  • Allow cookies to cool completely before cutting. Using a plastic knife helps make clean slices.

cake mix cookie bar recipe

Variations, Storing, and More

Variations: The Betty Crocker Yellow Cake Mix that I used is a 15.25 oz box. You can easily substitute the cake mix with another brand of the same size. You can also use other flavors of instant pudding mix (3.4oz box) Substitute the chocolate chips and M&Ms for other flavors, candies, or nuts. There are so many delicious combinations. Here are a few suggestions to get the ideas flowing: 

  • Strawberry cake mix with white chocolate pudding. Use white chocolate chips.
  • Chocolate Cake Mix with chocolate pudding. Use peanut butter chips and top with reeses pieces. 
  • Lemon cake with cream cheese pudding. Dust the top with powdered sugar.

The cookie bars also make a delicious base for adding a scoop of ice cream on top along with your favorite sundae toppings like chocolate, caramel and whipped cream.  

Storage: Store cooled bars in an airtight container for up to 5 days. You can also freeze the cookie bars. Wrap each bar with plastic wrap then you can wrap again with aluminum foil, or place them all in a freezer ziploc bag. Store for up to 3 months.

cookie bars made with cake mix

Cake Mix Cookie Bars Recipe

4.5 from 8 votes

Cake Mix Cookie Bars are a simple, quick, and delicious treat everyone will love! They are a fab option for lovers of cake and cookies.

Course Dessert
Cuisine American
Prep Time 5 minutes
Cook Time 24 minutes
Total Time 29 minutes
Servings 16
Calories 331 kcal
Author Lil' Luna


  • 1 box yellow cake mix (I used Betty Crocker)
  • 1 small box White chocolate or vanilla instant pudding mix
  • 1/4 cup water
  • 3/4 cup vegetable oil
  • 2 eggs
  • 1 cup mini M&Ms (divided)
  • 1/2 cup chocolate chips


  1. Preheat oven to 350.

  2. In a large bowl combine cake mix, pudding, water, oil and eggs using a mixer.

  3. Mix until well combined.

  4. Fold in chocolate chips and ½ cup mini M&Ms.

  5. Pour into a greased 9x13 pan.

  6. Sprinkle with remaining M&Ms.

  7. Bake for 24-28 minutes or until golden brown on the edges.

Recipe Video

Recipe adapted from Parent Pretty.



Kristyn Merkley

My name is Kristyn and I’m the mom of SIX stinkin’ cute kids and the wife to my smokin’ hot hubby, Lo. My mom’s maiden name is Luna, and I’m one of the many crafty “Lil’ Lunas” in the fam. On this site I like to share all things creative – from recipes to home decor to gifts and home decor ideas. Welcome!

More by Kristyn

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Recipe Rating


  1. 4 stars
    Ok, I made these tonight and they were a hit! One thing tho…they did not look like yours. I baked them for 26 minutes and the edges were golden, but the middle was jiggly and it looked just like a baked cake!
    I like my cookies gooey, so I took a chance. I let them cool for about an hour and they finally collapsed but very wet in the middle. Like I said, I really like that and so did the kids. I think you could put m&ms on mashed turnips and kids would at least try them!
    Don’t know what I would change to get them to bake a little more evenly??
    Worth a try (so easy people!)

    1. Hi Chalene! So glad you liked the bars, but I’m sorry they collapsed in the middle. The only thing I would suggest is baking them 3-5 minutes longer. What size of pan did you use?

      1. Maybe collapsed is the wrong word. Flattened out may be better? I used a 9×13 glass pan. When I checked on it it looked like a cake. Risen to the top of the pan. Yours looked very flat like abat cookie should. I used a store brand cake mix which could’ve been the culprit? Màybe I shouldn’t add any water next time. I’ll try again soon and let you know!

  2. 4 stars
    Made this today to.take to my husband’s work Easter Party. Although they taste delicious they look nothing like yours. 🙁 Mine rose like a cake would rather than stay compacted like a “bar” should. I used a 9×13 metal pan.

  3. I got the Duncan Hines cake mix. Do I still use the recipe you provided or do I follow the directions on the box? Thx!

    1. I haven’t tried that, but I don’t see why they wouldn’t work? If you try it, let me know what size pan you used and how they turned out:) I’d love to know!

  4. For those of you who said they didn’t turn out like the photos…check the color of your metal dish (dark vs light metal or glass) and use the appropriate oven temp according to the box. I did this twice using my glass dish. Once at 350 with average results, and once at 375- the higher setting on the box mix for shiny light aluminum and they came out perfect. good luck.

  5. Thank you for sharing these! These are my family’s favorite cookie bar. Today I made cookie bars following your recipe using pumpkin cake mix, white chocolate pudding, 1C cinnamon chips, and 1/2C of white chocolate chips and they are AMAZING!!

  6. After reading some reviews where people had problems with these bars setting up, I was weary about making them, but I figured what the heck. I made them per directions, with the exception of the oil, I replaced that with the equal amount of melted butter. I used non-stick baking spray in my pan, and baked it for about 28 min, then allowed it to cool completely before cutting. They came out perfect, both in looks and taste. My grandson loves them, and my husband had one and had to be alone because he was having a moment lol.

    1. “TY” SO much for your post/tip on using BUTTER instead of oil! Made them for hubbs company picnic. They looked SO good, perfectly brown, looked like photo – Best part, SO EASY! ????

  7. Made these and same problem as other they rose really well then when cooled the edges are good but collapsed in the middle. Was it determine why? They are still really good and I’ll try again because they are so good

  8. 4 stars
    I read all the ingredients no where does it list chocolate chips. I quickly read how to make it. I went grocery shopping buying the ingredients I needed. It wasn’t until I started making the recipe that I saw chocolate chips were needed. I did have them in the house so I made them without the chocolate chips. This recipe is very easssy to make. It came out very moist and pretty to look at due to the M&M but its bland. The chocolate chips would have given it that extra flavor. I don’t know if there is a way to revise the recipe, if there is, you really should.


  9. 5 stars
    This is a wonderful recipe. I made it with yellow cake mix and I happened to have a Godiva chocolate and caramel pudding mix and used that! I added in the chocolate chips and a handful of caramel baking bits that I had on hand. It was gone before I could blink an Thank you for a fantastic and super easy recipe!!!!