Red Velvet Birthday Cupcakes

Bahan-bahan (24 porsi)

• 2½ cups all-purpose flour
• ½ cup unsweetened cocoa powder
• 1 teaspoon baking soda
• ½ teaspoon salt
• 1 cup butter, (at room temperature)
• 2 cups granulated white sugar
• 4 large eggs
• 1 cup sour cream
• ½ cup milk
• 1 ounce (2 tablespoons) red food coloring
• 2 teaspoons vanilla extract