Marble Cupcake Batter:
- 1 2/3 cups (209g) all-purpose flour, spooned and leveled
- 1/2 tsp baking powder
- 1/4 tsp baking soda
- 1/2 tsp fine salt
- 1/2 cup (113g) unsalted butter, melted
- 1 cup (200g) granulated sugar
- 1 large egg, room temperature
- 1/4 cup (60g) plain yogurt or sour cream
- 3/4 cup + 1 tbsp (195ml) whole milk, divided
- 2 tsp pure vanilla extract
- 2 tbsp (10g) unsweetened natural cocoa powder
Milk Chocolate Buttercream:
- 1/2 cup (113g) unsalted butter, softened
- 1 3/4 cups (210g) confectioners’ sugar
- 1/4 cup (21g) unsweetened cocoa powder, sifted
- 2 tbsp (30ml) heavy cream
- 1 tsp pure vanilla extract
- Pinch of salt
Vanilla Buttercream:
- 1/2 cup (113g) unsalted butter, softened
- 1 3/4 cups (210g) confectioners’ sugar
- 2 tbsp (30ml) heavy cream
- 1 tsp pure vanilla extract
- Pinch of salt