Good-Cooking - Golden Vanilla Cupcakes

Ingredients

• 1 1/2 cups all-purpose flour
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 1/2 cup (1 stick) unsalted butter, softened
• 3/4 cup granulated sugar
• 2 eggs
• 1 egg yolk
• 2 teaspoons vanilla extract
• 1/2 cup milk