Red Velvet Cupcakes

INGREDIENTS

• 1/2 cup butter
• 1 1/2 cups white sugar
• 2 eggs
• 1 cup buttermilk
• 1 fluid ounce red food coloring
• 1 teaspoon vanilla extract
• 1 1/2 teaspoons baking soda
• 1 tablespoon distilled white vinegar
• 2 cups all-purpose flour
• 1/3 cup unsweetened cocoa powder
• 1 teaspoon salt