This post may contain affiliate links. Please read our disclosure policy.
Old-fashioned Boston cream pie is a best-loved classic cake, not pie, that is utterly decadent and delicious!
What’s Not to Love?!
Boston cream pie is an easy-to-make dessert that combines the best of a cream pie and cake. It was invented at Boston’s Omni Parker House Hotel in 1856 and has since become the official state dessert of Massachusetts.
We love making Boston Cream Poke Cake but this classic version filled with homemade custard and topped with chocolate ganache is to die for! Enjoy this decadent dessert on holidays or any time you need a cake that feeds a crowd.
Why we love it
- Decadent. The rich combination of creamy custard, tender cake, and luscious chocolate ganache creates a truly indulgent dessert experience.
- An even quicker prep time. Make this easy cake recipe even easier by using store-bought cake rounds!
- Change it up. Experiment with variations such as making Boston Cream Cupcakes or adding decorative elements like a chocolate web design (see directions below).
Ingredients
PREP TIME (more if you need to cook cake rounds): 25 minutes
ASSEMBLE TIME: 40 minutes
The Cake:
- 2 (8-inch) white or yellow cake rounds – You will need two fully baked round layers of yellow cake, white, or Vanilla Cake. I prefer 8-inch rounds but 9-inch cake pans also work. Purchase at the bakery, use a box cake mix or your favorite homemade recipe.
The Custard:
- 4 large egg yolks – How to Separate Egg Whites
- ½ cup granulated sugar
- ¼ cup corn starch
- ¼ teaspoon salt
- 1½ cups whole milk
- 1 tablespoon vanilla extract
- 2 tablespoons unsalted butter
The Ganache:
- ¾ cup heavy cream
- 1 cup semi-sweet chocolate chips
How to Make Boston Cream Pie
- PASTRY CREAM FILLING. In a medium saucepan, whisk 4 large eggs, ½ cup sugar, ¼ cup cornstarch, and ¼ teaspoon salt until well combined and no lumps remain.
- Whisk in 1½ cups milk until well combined. Heat the mixture over medium-high heat for 2 to 4 minutes, or until thickened. Whisk constantly.
- Remove from heat and whisk in 1 tablespoon vanilla. Add 2 tablespoons pieces of butter, and stir until completely melted and smooth.
- Pour the custard into a bowl, cover with plastic wrap, and refrigerate until completely chilled.
- ASSEMBLE. Level 2 (8-inch) sponge cake rounds. Place one of the cake rounds on a serving plate, and gently spread the cooled custard evenly over the cake layer with an offset spatula. Add the second cake layer on top.
- GANACHE. Add 1 cup chocolate chips to a medium bowl. Add ¾ cup heavy whipping cream to a separate microwave-safe bowl or measuring cup, and heat one minute on high, or until boiling.
- Pour the hot milk mixture over the chocolate chips and let stand for one minute. Using a fork, stir the ganache until it is smooth and the chocolate has melted completely.
- Pour the chocolate glaze over room temperature cake, spreading evenly. Let stand 30-60 minutes, until the ganache has cooled and set.
add a web design to the top of the cake?
- Many Boston cream pies showcase a pretty web design in the ganache. Make the chocolate ganache listed in the recipe as well as a white ganache or white icing:
- Pour the chocolate ganache onto the cake as directed in the recipe then use white icing to pipe on a spiral design that starts in the center and extends to the edge.
- Use a toothpick or wooden skewer to pull the white icing out every few centimeters along the entire spiral.
- Be sure to stop before you touch or connect your pulled icing with the line of icing in the spiral.
Complete the Meal
- MAIN DISHES: Chicken Stroganoff, Drumsticks in the Oven, Smothered Pork Chops
- SIDE DISHES: Yellow Squash Casserole, Roasted Green Beans, Easy Tortellini Salad
- More CAKES: Boston Cream Poke Cake, Gooey Butter Cake, German Chocolate Cake
More collections: Easy Cake Recipes, Cakes that Feed a Crowd, Holiday Cakes
Boston Cream Pie
Old-fashioned Boston cream pie is a best-loved classic cake, not pie, that is utterly decadent and delicious!
Ingredients
- 2 (8-inch) white or yellow cake rounds, baked and cooled
for the custard:
- 4 large egg yolks
- ½ cup sugar
- ¼ cup corn starch
- ¼ teaspoon salt
- 1½ cups whole milk
- 1 tablespoon vanilla extract
- 2 tablespoons butter, cut into pieces
for the ganache:
- ¾ cup heavy whipping cream
- 1 cup semi-sweet chocolate chips
Instructions
Custard
- In a medium saucepan, whisk 4 large eggs, ½ cup sugar, ¼ cup cornstarch, and ¼ teaspoon salt until well combined and no lumps remain.
- Whisk in 1½ cups milk until well combined. Heat the mixture over medium-high heat for 2 to 4 minutes, or until thickened. Whisk constantly.
- Remove from heat and whisk in 1 tablespoon vanilla. Add 2 tablespoons pieces of butter, and stir until completely melted and smooth.
- Pour the custard into a bowl, cover with plastic wrap, and refrigerate until completely chilled.
Assemble the cake
- To assemble the cake, level 2 (8-inch) cake rounds using a serrated knife or cake leveler.
- Place one of the cake rounds on a serving plate, and gently spread the cooled custard evenly over the cake layer. Add the remaining cake layer on top.
Ganache
- Add 1 cup chocolate chips to a medium bowl. Add ¾ cup heavy whipping cream to a separate microwave-safe bowl or measuring cup, and heat one minute on high, or until boiling.
- Pour the hot whipping cream over the chocolate chips and let stand for one minute. Using a fork, stir the ganache until it is smooth and the chocolate has melted completely.
- Pour the ganache over the cake, spreading evenly. Let stand 30-60 minutes, until the ganache has cooled and set.
Video
Notes
Make ahead of time. Freeze the cake layers up to a month ahead of time. The custard can be made ahead but only 24 hours in advance. I do not recommend freezing the cake to serve later. The cornstarch in the cream filling will compromise the texture when it thaws.
STORE. Cover leftovers loosely with foil or plastic wrap and refrigerate for 3 to 4 days.
Nutrition
Calories: 555kcal, Carbohydrates: 91g, Protein: 6g, Fat: 18g, Saturated Fat: 10g, Cholesterol: 94mg, Sodium: 715mg, Potassium: 183mg, Fiber: 2g, Sugar: 52g, Vitamin A: 420IU, Vitamin C: 0.1mg, Calcium: 243mg, Iron: 2.9mg
Nutrition information is automatically calculated, so should only be used as an approximation.
Making this recipe? Tag us!
Share it with us on Instagram using the hashtag #lilluna, so we can see what you’re creating in the kitchen!
Recipe FAQ
How do I keep the cake from sticking to the pan?
- If baking your own, Line the Cake Pans with Parchment Paper before adding the batter. Once removed from the oven, allow the cakes to fully cool on wire racks before adding the Boston cream.
How to decorate the cake?
- The chocolate ganache is a simple classic, but you can also add a dusting of powder sugar, toasted coconut, sliced almonds, and dark or white chocolate shavings.
Why is my Boston cream pie runny?
- The Boston cream should thicken significantly during the 2-4 minutes of cooking time. If the cream is still too runny after 4 minutes add more cornstarch.
- Using low-fat milk will cause thinner custard. Using whole milk will also help make a thicker and creamier custard.
- Stir constantly so that the bottom of the cream doesn’t burn.
How to cut and serve?
- The ganache topping can thicken and make it tricky to cut clean slices. Use hot water to heat the blade of a large kitchen knife, wipe it dry, and slice. The hot blade should cut right through all the layers.
Can I make the cake ahead of time?
- Freeze the cake layers up to a month ahead of time. The custard can be made 24 hours in advance and stored in the refrigerator.
- I do not recommend freezing the cake to serve later. The cornstarch in the cream filling will compromise the texture when it thaws.
How to store Boston cream pie?
- Cover the leftover Boston cream pie recipe loosely with foil or plastic wrap and refrigerate for 3 to 4 days.
For More Cakes:
Thank you Alicia from The Baker Upstairs.
I used milk chocolate chips because it’s all I had and the ganache is very liquid. Is this the reason?
Yes, probably. Milk chocolate has more sugar and so it liquefies when heated and will stay liquid, creating a thinner ganache. So typically you want to use less cream for sweeter chocolates. But, even if it’s thin, it should thicken as it cools. So give it a little time and it will probably be just fine. You could try putting it in the fridge for a minute to quicken the thickening process too.
Wow!! This pie is incredible! It was so easy to make and everyone in my house absolutely loved it. Thank you for sharing this recipe!