Ultimate Marble Cupcakes

Cupcakes

• 1 and 2/3 cups (210g) all-purpose flour
• 1/2 teaspoon baking powder
• 1/4 teaspoon baking soda
• 1/2 teaspoon salt
• 1/2 cup (115g) unsalted butter, melted
• 1 cup (200g) granulated sugar
• 1 large egg, room temperature
• 1/4 cup (60g) yogurt*
  
• 3/4 cup + 1 Tablespoon (195ml) milk, divided*
• 2 teaspoons vanilla extract
• 1/4 cup (32g) unsweetened cocoa power

Milk Chocolate Frosting

• 1 and 3/4 cups (210g) confectioners’ sugar
• 1/4 cup (32g) unsweetened cocoa powder
• 1/2 cup (115g) unsalted butter, softened to room temperature
• 2 Tablespoons (30ml) heavy cream or half-and-half*
• 1 teaspoon vanilla extract
• salt, to taste

Vanilla Frosting

• 1/2 cup (115g) unsalted butter, softened to room temperature
• 1 and 3/4 cups (210g) confectioners’ sugar
• 2 Tablespoons (30ml) heavy cream or half-and-half*
  
• 1 teaspoon vanilla extract
• salt, to taste