Red Velvet Cake

Ingredients

• 2 ounces red food color (2 bottles)
• 2 Tablespoons cocoa powder
• 1 cup unsalted butter, softened
• 1 Tablespoon white vinegar
• 1 1/2 cups sugar
• 1 teaspoon baking soda
• 2 eggs
• 2 1/4 cups flour
• 1 teaspoon salt
• 1 cup buttermilk
• 1 teaspoon vanilla
• 4 Tablespoons flour
• 1 cup milk
• 1 cup sugar
• 1/2 cup butter
• 1/2 cup shortening