Creamy Boston Cupcakes

Featured in Sweet Things.

Homemade Boston cream cupcakes with vanilla sponge, pastry cream, and a glossy chocolate topping.
Soo Ben
Updated on Wed, 05 Mar 2025 04:26:23 GMT
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If you love the classic flavors of Boston cream pie, you’ll adore these Boston Cream Cupcakes. Imagine biting into a fluffy vanilla cupcake, discovering a rich, silky pastry cream filling, and finishing with a glossy chocolate ganache topping that melts in your mouth. These cupcakes bring together everything you love about the original Boston cream pie in a fun, handheld form that’s perfect for any occasion.

A Decadent Handheld Dessert

Yes, this recipe has a few steps, but the results are 100% worth it. The pastry cream needs time to chill before assembling, so I always make it a day ahead to keep things simple. Once everything comes together, you’ll have bakery-worthy cupcakes that look stunning and taste even better.

The first time I made these, I was nervous about filling the cupcakes, but once I got the hang of it, it was surprisingly easy. Now, they’re one of my most requested desserts at family gatherings.

Key Ingredients and Why They Matter

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For the Vanilla Cupcakes

  • All-Purpose Flour: The foundation of the cupcakes, providing structure and softness.
  • Baking Powder: Ensures the cupcakes rise and stay light and fluffy.
  • Butter & Sugar: Creaming them together creates an airy, delicate texture.
  • Eggs: Add moisture and help give the cupcakes their soft crumb.
  • Whole Milk: Keeps the batter rich and tender, making each bite melt in your mouth.
  • Vanilla Extract: Essential for classic vanilla cupcake flavor.

For the Pastry Cream Filling

  • Whole Milk: The base of the pastry cream, making it lusciously smooth.
  • Egg Yolks: Give the filling a rich, custardy texture.
  • Cornstarch: Helps thicken the cream for that perfect velvety consistency.
  • Butter & Vanilla: Add depth and enhance the flavor.

For the Chocolate Ganache

  • Semi-Sweet Chocolate: Gives the ganache a deep, smooth chocolate flavor.
  • Heavy Cream: Creates a glossy, rich texture when combined with chocolate.
  • Corn Syrup (Optional): Adds extra shine for a picture-perfect topping.

I always use high-quality vanilla extract and real butter for the best flavor. Trust me, the extra effort makes a difference!

Step-By-Step Baking Instructions

Step 1: Making the Pastry Cream (Start First!)
Heat 2 cups of whole milk in a saucepan over medium heat until steaming, but not boiling.
Step 2:
In a bowl, whisk together sugar, egg yolks, and cornstarch until smooth.
Step 3:
Slowly pour ½ cup of the hot milk into the egg mixture, whisking constantly to prevent curdling.
Step 4:
Gradually whisk the tempered mixture back into the saucepan and cook on low heat, stirring until thickened (about 2-3 minutes).
Step 5:
Remove from heat and stir in butter and vanilla extract.
Step 6:
Transfer to a bowl, press plastic wrap directly onto the surface, and chill for at least 2 hours (or overnight).
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Step 7: Baking the Vanilla Cupcakes
Preheat oven to 350°F (175°C) and line a muffin tin with cupcake liners.
Step 8:
In a bowl, whisk together flour, baking powder, and salt.
Step 9:
In a separate bowl, beat butter and sugar until light and fluffy.
Step 10:
Add eggs one at a time, mixing well, then stir in vanilla extract.
Step 11:
Alternate adding dry ingredients and milk, mixing until just combined.
Step 12:
Divide batter evenly into the cupcake liners, filling ⅔ full.
Step 13:
Bake for 18-20 minutes, or until a toothpick inserted in the center comes out clean.
Step 14:
Let the cupcakes cool completely before filling.

Storing & Serving Tips

Storage: Store cupcakes in an airtight container in the fridge for up to 4-5 days.

Let sit at room temperature for 15-20 minutes before serving to soften the pastry cream.

Freezing (Not Recommended!)

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Because of the custard-based filling, freezing isn’t ideal as it may separate when thawed.

Ganache Shine Tip

For extra glossy ganache, stir in ½ teaspoon of butter after melting.

Frequently Asked Questions

→ Can I make these cupcakes ahead of time?
Yes, store them in an airtight container in the fridge for up to 5 days.
→ Do I need to use a piping bag for the filling?
A piping bag makes it easier, but you can also use a ziplock bag with a corner cut off.
→ Can I use store-bought pudding instead of pastry cream?
Yes, but homemade pastry cream gives the best authentic flavor.
→ How do I prevent cupcakes from sinking?
Avoid overfilling the liners and ensure your baking powder is fresh.
→ Can I skip the corn syrup in the ganache?
Yes, but the ganache may not be as thick and glossy.

Boston Cream Cupcakes

Fluffy cupcakes with creamy filling and chocolate ganache.

Prep Time
65 Minutes
Cook Time
25 Minutes
Total Time
90 Minutes
By: Sou

Category: Desserts

Difficulty: Intermediate

Cuisine: American

Yield: 24 Servings (24 cupcakes)

Dietary: Vegetarian

Ingredients

→ Pastry Cream

01 1 cup (236ml) milk
02 1 cup (236ml) heavy cream
03 ⅓ cup (67g) + 3 tablespoons granulated sugar, divided
04 ¼ teaspoon salt
05 5 large egg yolks, room temperature
06 3 tablespoons cornstarch
07 1 teaspoon vanilla extract
08 4 tablespoons unsalted butter, softened and cut into pieces

→ Cupcakes

09 ½ cup (113g) unsalted butter, softened
10 ½ cup (118ml) avocado oil or vegetable oil
11 1 ¾ cups (350g) granulated sugar
12 4 large eggs
13 2 teaspoons vanilla extract
14 3 cups (375g) all-purpose flour
15 1 tablespoon baking powder
16 ¾ teaspoon salt
17 1 ¼ cups (300ml) buttermilk, room temperature

→ Ganache Frosting

18 1 cup (170g) semisweet chocolate chips
19 ½ cup (118ml) heavy cream
20 2 tablespoons light corn syrup (optional)
21 ⅓ cup (45g) powdered sugar

Instructions

Step 01

In a medium saucepan over medium heat, combine milk, cream, ⅓ cup sugar, and salt. Stir until sugar dissolves and the mixture starts to simmer, then remove from heat and cool for 10 minutes.

Step 02

In a large bowl, whisk egg yolks with the remaining sugar until slightly thickened. Sprinkle in cornstarch and mix well. Slowly drizzle ⅓ cup of the warm milk mixture into the egg yolks while whisking constantly, then gradually add the rest.

Step 03

Pour the mixture back into the saucepan and return to medium heat. Whisk continuously until it thickens. Remove from heat, strain through a fine mesh sieve into a bowl, and stir in vanilla and butter until smooth. Cover with plastic wrap touching the surface and refrigerate for at least 2 hours.

Step 04

Preheat oven to 350°F (175°C). Line two cupcake tins with paper liners. Beat butter, oil, and sugar together until light and fluffy. Add eggs one at a time, mixing well after each. Stir in vanilla.

Step 05

In a separate bowl, whisk flour, baking powder, and salt. Using a spatula, alternate adding dry ingredients and buttermilk to the butter mixture, beginning and ending with flour. Mix until just combined.

Step 06

Fill cupcake liners ¾ full. Bake for 17-19 minutes or until a toothpick inserted comes out clean. Cool for 10 minutes in the pan, then transfer to a wire rack to cool completely.

Step 07

In a heatproof bowl, combine chocolate chips, heavy cream, and corn syrup. Microwave in 25-second intervals, stirring between each, until smooth. Sift in powdered sugar and let cool slightly.

Step 08

Cut a small 1½-inch-wide cavity into each cupcake, leaving a thin top piece to replace later. Pipe chilled pastry cream into the holes, then cover with the reserved tops.

Step 09

Drizzle ganache over each cupcake, ensuring a smooth, glossy finish. Allow to set before serving.

Notes

  1. Tempering the eggs prevents them from scrambling when mixed with the hot cream.
  2. For best results, use room-temperature ingredients when making the cupcake batter.
  3. The ganache should be thick enough to coat the cupcakes but still fluid enough to spread evenly.

Tools You'll Need

  • Medium saucepan
  • Fine mesh strainer
  • Mixing bowls
  • Cupcake pan
  • Hand or stand mixer
  • Wire rack
  • Piping bag or ziplock bag

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains dairy and eggs
  • Contains gluten

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 360
  • Total Fat: 20 g
  • Total Carbohydrate: 40 g
  • Protein: 5 g