Ingredients
Chocolate chip (cup)cakes:
3 1/4 cups plus 1 tbsp. cake flour, divided
4 1/2 tsp baking powder
1/4 tsp salt
1 tbsp. vanilla
1 cup plus 2 tbsp. milk
1 3/4 sticks of softened butter
1 3/4 cups sugar
5 large egg whites at room temperature (about 1 cup)
2 cups of semi-sweet chocolate chips
Raspberry Swiss meringue buttercream
5 large egg whites
1 cup plus 2 tbsp. sugar
Pinch of salt
4 sticks softened unsalted butter
1 1/2 tsp. vanilla
6 ounces fresh raspberries
Instructions
Chocolate chip cake
- Preheat oven to 350. Spray and line cupcake tins or 9 inch rounds.
- Reserve 1 tablespoon of cake flour. Combine cake flour, baking powder, and salt. Stir together milk and vanilla.
- Cream butter until smooth. Add sugar and beat until pale and fluffy.
- Stir in one-third of flour, half of milk, one-third of flour, half of milk, and one-third of flour, until just combined.
- Beat egg whites to stiff peaks and fold into batter in thirds.
- Toss chocolate chips in reserved flour and fold gently into batter. Divide between pans.
- Bake cupcakes for around 22 minutes or cakes for 34 minutes until golden brown and set. Cool completely before frosting.
Raspberry Swiss meringue buttercream
- Combine egg whites, sugar, and salt in a heatproof mixing bowl over simmering water until warm and sugar is dissolved. Mixture should feel smooth when rubbed between two fingers.
- Remove from heat and begin to beat on mixer speed low. Increase speed to medium-high and beat until stiff peaks form. Continue until mixture is glossy and completely cool.
- Decrease speed to medium-low and add butter a few tablespoons at a time, mixing well after each addition. If using a stand mixer, switch to the paddle attachment and beat until smooth.
- Stir in vanilla. Add raspberries and mix until desired consistency (Martha says streaky, Mac didn’t like the berry chunks).
- Frost cooled cakes and garnish with remaining raspberries.