The first time I made Boston Cream Pie cupcakes, I wanted the nostalgia of a classic Boston cream pie in a hand-held bite. Soft vanilla cupcakes, a silky pastry cream center, and a glossy chocolate ganache on top—each element plays a role. These cupcakes are perfect for potlucks, birthday parties, or a special weeknight treat when you want something a little more festive than a plain cupcake.
Why you’ll love this dish
These cupcakes are a compact take on a beloved dessert. They combine a tender vanilla cake, a rich custard filling, and a shiny chocolate topping. They’re impressive to serve but straightforward to make. Make them when you want crowd-pleasing dessert that can be prepped ahead.
“We served these at a family brunch and everyone asked for the recipe. The pastry cream is unbelievably smooth.” — a friend and repeat baker
Step-by-step overview
- Make a simple vanilla cupcake batter and bake cupcakes.
- Cook a thick pastry cream (custard) and cool it.
- Heat cream and pour over chocolate to make ganache; chill until firm.
- Core cupcakes, fill centers with pastry cream, and top with ganache. Chill, then serve closer to room temperature.
Ingredients
- 6 tbsp (84 g) unsalted butter, room temperature (I use Challenge Butter)
- 3/4 cup (155 g) sugar
- 6 tbsp (86 g) sour cream, room temperature
- 2 tsp (10 ml) vanilla extract
- 3 large egg whites, room temperature
- 1 1/4 cups (163 g) all-purpose flour
- 2 tsp (8 g) baking powder
- 1/4 tsp salt
- 6 tbsp (90 ml) milk, room temperature
- 2 tbsp (30 ml) water, room temperature
Pastry cream (custard):
- 2 egg yolks
- 6 tbsp (78 g) sugar
- 1 1/2 tbsp cornstarch
- 1 cup + 2 tbsp (270 ml) milk
- 1 tbsp (14 g) salted butter
- 1 tsp vanilla extract
Chocolate ganache:
- 12 oz (338 g) semi-sweet chocolate chips
- 2 tbsp (30 ml) light corn syrup
- 3/4 cup + 2 tbsp (210 ml) heavy whipping cream
Notes/substitutions:
- Swap sour cream for Greek yogurt (full-fat) if needed.
- Use an equal amount of non-dairy milk and vegan butter + a dairy-free chocolate to make a dairy-free version (see Variations).
- For a lighter texture, you can substitute part of the butter with oil, but flavor will change.
Directions
- Preheat the oven to 350°F (176°C). Line a 12-cup cupcake pan with liners.
- In a large bowl, cream 6 tbsp butter and 3/4 cup sugar until pale and fluffy, about 3–4 minutes. Don’t rush this—air incorporated here helps the cupcakes rise.
- Mix in 6 tbsp sour cream and 2 tsp vanilla until smooth.
- Add the 3 egg whites in two additions, beating until incorporated after each. Scrape the bowl down as needed.
- Whisk together 1 1/4 cups flour, 2 tsp baking powder, and 1/4 tsp salt in a separate bowl. Combine 6 tbsp milk and 2 tbsp water in a measuring cup.
- Add half the dry ingredients to the batter and mix briefly. Pour in the milk mixture and mix just until combined. Add the remaining dry ingredients and mix until the batter is smooth. Avoid overmixing.
- Fill cupcake liners about halfway. Bake 15–17 minutes, until a toothpick inserted in the center comes out with a few moist crumbs.
- Let cupcakes cool in the pan 2–3 minutes, then transfer to a wire rack to cool completely.
Make the pastry cream while cupcakes cool:
9. Whisk 2 egg yolks in a medium bowl and set aside.
10. In a saucepan, whisk together 6 tbsp sugar, 1 1/2 tbsp cornstarch, and 1 cup + 2 tbsp milk until smooth.
11. Cook over medium-high heat, stirring constantly, until the mixture thickens and just begins to bubble. Reduce heat to medium and simmer 1–2 minutes while stirring.
12. Temper the yolks: slowly whisk a few tablespoons of the hot milk mixture into the yolks, then whisk the warmed yolks back into the saucepan. This prevents scrambling.
13. Bring the mixture back to a light boil and cook while stirring for 1–2 more minutes until very thick. Remove from heat.
14. Stir in 1 tbsp butter and 1 tsp vanilla until smooth. Transfer to a bowl, cover with plastic directly on the surface to prevent a skin, and cool to room temperature. Chill if needed.
Make the ganache while pastry cream cools:
15. Place 12 oz chocolate chips and 2 tbsp corn syrup in a heatproof bowl. Heat 3/4 cup + 2 tbsp heavy cream just to a boil.
16. Pour the hot cream over the chocolate. Let sit 3–5 minutes. Whisk until smooth and glossy.
17. Chill the ganache in the fridge until cool and slightly firm, about 1–2 hours (shorter if your fridge is very cold). You want it pipeable or spreadable, not completely liquid.
Assemble:
18. Use a cupcake corer or a small knife to remove the center of each cupcake, leaving a hollow for filling.
19. Spoon or pipe the pastry cream into each cupcake center, filling nearly to the top.
20. Top each filled cupcake with chilled ganache. You can pipe roses (start in the center and swirl outward), use a small offset spatula, or simply spoon and smooth. (Ateco 844, Wilton 2D or 1M all work for decorative swirls.)
21. Refrigerate the cupcakes until the ganache firms and flavors meld, at least 30 minutes. The ganache will be firmer when cold.
22. Serve closer to room temperature for the best texture. These cupcakes are best eaten within 3–4 days.
How to serve Boston Cream Pie Cupcakes
- Let chilled cupcakes sit at room temperature 30–60 minutes before serving so the ganache softens and the pastry cream becomes silky.
- Plate on a simple dessert tray. Garnish with a dusting of powdered sugar or a few chocolate shavings.
- Pair with coffee, black tea, or a dessert wine (late-harvest Riesling or tawny port) for a grown-up pairing. For kids or brunch, serve with cold milk or hot chocolate.
How to store
- Refrigerate assembled cupcakes in an airtight container for up to 3–4 days. The pastry cream is cooked and must be kept chilled.
- To freeze: freeze unfilled cupcakes (baked and cooled) for up to 3 months in an airtight container. Thaw overnight in the fridge, then fill and top before serving. You can also freeze fully assembled cupcakes, but ganache texture may change; thaw overnight in the fridge.
- Reheating: bring refrigerated cupcakes to room temperature (about 30–60 minutes) before serving. Do not microwave whole filled cupcakes—microwave can melt the filling unevenly.
- Food safety: the pastry cream is cooked through; ensure it has been brought to a boil and simmered briefly so the eggs are fully cooked. Keep at safe refrigeration temperatures (below 40°F / 4°C).
Tips to make
- Use room-temperature eggs, dairy, and butter for a smoother batter and better rise.
- Don’t skimp on creaming time—3–4 minutes makes a noticeable difference in cake texture.
- Temper egg yolks when adding hot milk to avoid cooked bits in your custard.
- Cover pastry cream with plastic wrap pressed directly on the surface to prevent a skin.
- Chill the ganache until it’s thick enough to hold shape; too-warm ganache will sink into the custard.
- If you don’t have a corer, use a small melon baller or a paring knife to remove centers.
- For neater piping, chill filled cupcakes 10–15 minutes before piping ganache so the pastry cream doesn’t ooze.
Variations
- White chocolate ganache: swap semi-sweet chips for white chocolate and reduce cream to taste; add a pinch of salt.
- Coffee pastry cream: stir 1–2 tsp instant espresso into the milk for a coffee-flavored custard.
- Mini cupcakes: bake in mini muffin tins, reduce bake time to 9–11 minutes, and scale fillings accordingly.
- Gluten-free: use a 1:1 gluten-free flour blend; add 1/8–1/4 tsp xanthan gum if your blend lacks it.
- Vegan/dairy-free: use vegan butter, full-fat coconut yogurt in place of sour cream, non-dairy milk, and a vegan chocolate for ganache. Replace eggs in pastry cream with a cornstarch-thickened coconut milk custard or use a commercial vegan custard base.
FAQs
Q: How long does this take from start to finish?
A: Active time is about 45–60 minutes (batter, pastry cream prep, ganache prep). With cooling and chilling, plan 3–4 hours total; you can make components ahead to save time.
Q: Can I make the pastry cream or ganache ahead of time?
A: Yes. Pastry cream can be made 1–2 days ahead and stored in the fridge (covered directly on the surface). Ganache can be made and refrigerated for 2–3 days; warm slightly before using if it’s too firm.
Q: Can I use a cake mix instead of making cupcakes from scratch?
A: You can. Use any white or yellow cake mix and bake according to box directions in cupcake liners. Homemade batter gives more control over texture and flavor but boxed mix saves time.
Q: Are these safe to leave out at a party?
A: Because they contain pastry cream, keep cupcakes refrigerated until 30–60 minutes before serving. Do not leave them out at room temperature for more than 2 hours.
Q: My ganache seized or looks grainy. What do I do?
A: If ganache is grainy, try warming it gently over a double boiler while whisking, or add a tablespoon of warm cream and whisk until smooth. Avoid overheating chocolate. If the texture doesn’t recover, remelt gently and strain if needed.
If you want, I can scale this recipe for more or fewer cupcakes, convert measurements to metric-only format, or give step-by-step photos for any part of the process. Which would help you most?
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Boston Cream Pie Cupcakes
- Total Time: 80 minutes
- Yield: 12 servings
- Diet: Vegetarian
Description
Delicious handheld Boston Cream Pie cupcakes featuring soft vanilla cake, silky pastry cream, and glossy chocolate ganache.
Ingredients
- 6 tbsp (84 g) unsalted butter, room temperature
- 3/4 cup (155 g) sugar
- 6 tbsp (86 g) sour cream, room temperature
- 2 tsp (10 ml) vanilla extract
- 3 large egg whites, room temperature
- 1 1/4 cups (163 g) all-purpose flour
- 2 tsp (8 g) baking powder
- 1/4 tsp salt
- 6 tbsp (90 ml) milk, room temperature
- 2 tbsp (30 ml) water, room temperature
- 2 egg yolks
- 6 tbsp (78 g) sugar
- 1 1/2 tbsp cornstarch
- 1 cup + 2 tbsp (270 ml) milk
- 1 tbsp (14 g) salted butter
- 1 tsp vanilla extract
- 12 oz (338 g) semi-sweet chocolate chips
- 2 tbsp (30 ml) light corn syrup
- 3/4 cup + 2 tbsp (210 ml) heavy whipping cream
Instructions
- Preheat the oven to 350°F (176°C). Line a 12-cup cupcake pan with liners.
- Cream 6 tbsp butter and 3/4 cup sugar until pale and fluffy, about 3-4 minutes.
- Mix in 6 tbsp sour cream and 2 tsp vanilla until smooth.
- Add 3 egg whites in two additions, beating until incorporated.
- Whisk together 1 1/4 cups flour, 2 tsp baking powder, and 1/4 tsp salt in a separate bowl.
- Combine 6 tbsp milk and 2 tbsp water in a measuring cup.
- Add half the dry ingredients to the batter and mix briefly.
- Pour in the milk mixture and mix just until combined.
- Add the remaining dry ingredients and mix until smooth.
- Fill cupcake liners halfway. Bake for 15-17 minutes.
- Let cool in the pan for 2-3 minutes, then transfer to a wire rack to cool completely.
- Make the pastry cream while cupcakes cool: whisk 2 egg yolks in a bowl.
- Whisk together 6 tbsp sugar, 1 1/2 tbsp cornstarch, and 1 cup + 2 tbsp milk until smooth in a saucepan.
- Cook over medium-high heat until thickened. Reduce heat and simmer, stirring.
- Temper the yolks with hot milk mixture and return to saucepan.
- Bring to a light boil, cooking until very thick. Remove from heat and stir in 1 tbsp butter and 1 tsp vanilla.
- Transfer to a bowl, cover, and cool.
- Make the ganache: place chocolate chips and corn syrup in a bowl.
- Heat cream just to a boil, then pour over chocolate. Whisk until smooth.
- Chill ganache until cool and slightly firm.
- Core each cupcake and fill with pastry cream.
- Top with ganache and refrigerate until set.
- Serve at room temperature for best texture.
Notes
For a dairy-free version, use non-dairy milk and vegan butter. These cupcakes are best enjoyed within 3-4 days.
- Prep Time: 60 minutes
- Cook Time: 20 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American