Print
The BEST Chocolate Cupcake Recipe

The Best Chocolate Cupcakes

After tons of testing and tweaking, I've finally discovered the BEST Chocolate Cupcake recipe! Truly! Keep reading for lots of recipe tips, insights into the science of baking, and the full printable recipe.
Course Dessert
Cuisine American
Prep Time: 30 minutes
Cook Time: 25 minutes
Total Time: 55 minutes
Yields: 12 cupcakes
Recipe by Tessa Arias

Ingredients

For the cupcakes::

  • 4 ounces (113 grams) bittersweet chocolate, finely chopped
  • 1/3 cup (28 grams) Dutch-process cocoa
  • 1 teaspoon instant espresso powder
  • 1/2 cup boiling water
  • 3/4 cup plus 2 tablespoons (113 grams) all-purpose flour
  • 1/2 cup (100 grams) granulated sugar
  • 1/4 cup (50 grams) packed light brown sugar
  • 1/2 teaspoon salt
  • 1/2 teaspoon baking soda
  • 1/2 cup (113 grams) sour cream, at room temperature (or plain full fat yogurt)
  • 1/4 cup vegetable oil
  • 2 large eggs plus one egg yolk, at room temperature
  • 2 teaspoons white vinegar
  • 1 teaspoon vanilla extract

For the frosting::

  • 1/3 cup (67 grams) granulated sugar
  • 2 large egg whites
  • Pinch salt
  • 12 tablespoons (170 grams) unsalted butter, cut into 12 pieces and at room temperature
  • 6 ounces (170 grams) semisweet chocolate, melted and cooled slightly
  • 1/2 teaspoon vanilla extract

Directions

Make the cupcakes:

  1. In a medium heatproof bowl add the chocolate, cocoa powder, and espresso powder. Pour hot water over mixture. Cover and let stand for 5 minutes. Whisk mixture gently until smooth then set aside to cool.
  2. Meanwhile, preheat the oven to 350°F. Line a standard 12-cup muffin tin with foil or paper liners.
  3. In a small bowl, whisk together the flour, sugar, salt, and baking soda.
  4. Whisk sour cream, oil, eggs, egg yolk, vinegar, and vanilla into the cooled chocolate mixture until smooth. Stir in the flour mixture until smooth, being careful not to overmix.
  5. Using a spring-loaded scoop, divide the batter evenly among prepared muffin cups. Bake until cupcakes are set and firm to the touch, about 20 minutes. Let cupcakes cool in pan on a wire rack for 10 minutes before removing from pan to cool completely, about 1 hour. Cupcakes can be stored in an airtight container at room temperature for up to 1 day.

Make the frosting:

  1. Combine the sugar, egg whites, and salt in the bowl of a stand mixer. Set bowl over a saucepan filled with 1-inch of gently simmering water. Whisking gently and constantly, heat mixture until sugar is dissolved and mixture is slightly thickened and foamy and registers 150°F on a candy thermometer or a digital thermometer, about 3 minutes.
  2. Fit stand mixer with whisk attachment and beat the egg white mixture on medium speed until slightly cooled and thickened, about 2 minutes. Add the butter, 1 piece at a time, until smooth and creamy. If the mixture looks curdled, that’s okay. Just keep beating until it becomes smooth.
  3. Add chocolate and vanilla and mix until combined. Increase speed to medium-high and beat until light, fluffy, and well combined, about 30 seconds, scraping down the sides of the bowl as necessary.
  4. Frosting can be made 1 day ahead of time and stored in an airtight container in the refrigerator. Warm frosting in the microwave for 5 to 10 seconds and stir until creamy again before frosting cupcakes.
  5. Frosting can also be transferred to a ziptop bag and frozen for up to 1 month. Defrost in the fridge overnight then rewhip in the stand mixer until light and smooth.