Red Velvet Cupcake with Cream Cheese Frosting

Ingredients:

2 1/4 cups flour
1/2 cup cocoa powder
1 teaspoon baking soda
1/2 teaspoon baking powder
1/2 teaspoon salt
1 cup butter
2 cups sugar
4 eggs
1 cup sour cream
1/2 cup milk
1 fluid ounce red food coloring
2 teaspoons vanilla extract