Marble cupcakes

Ingredients:

• 1.5 cups premium flour
• 1.5 tsp baking powder
• 1/4 teaspoon fine salt
• 2 large eggs at room temperature
• 2/3 cup sugar
• 170 g unsalted butter, melted
• 2 tsp vanilla extract
• 0.5 cups of milk
• 2 tablespoons cocoa powder

Preparation:

1. Preheat oven to 350°F (175°C) and position the rack on the middle shelf. Line a 12-cup muffin pan with paper liners.
2. In a medium bowl, whisk together the flour, baking powder, and salt. In another medium bowl, beat the eggs and sugar with a mixer until foamy, about 2 minutes. While whisking, gradually pour in the butter, then the vanilla extract. Slowly whisk in half the flour mixture. Then add all the milk and fold in the remaining flour mixture. Be careful not to overbeat the batter.
3. Transfer one-third of the batter (about 1 cup) to another bowl and stir in the cocoa powder. Evenly fill the molds with the yellow and chocolate batter, alternating between the two. Tap the mold firmly on the countertop a few times to even out the batter.
4. Bake until a tester inserted into the center of a cupcake comes out clean, 18-20 minutes. Let the cupcakes cool in the pan on a wire rack for 10 minutes, then unmold them. Cool completely on the rack. Decorate, if desired.