1 1/4 cups all-purpose flour
1 tablespoon unsweetened cocoa powder
1 1/4 teaspoons baking soda
1/2 teaspoon salt
 
1/2 cup milk
2 tablespoons red food coloring
1 1/2 teaspoons distilled white vinegar
1/2 teaspoon vanilla extract
 
1/4 cup unsalted butter, softened
3/4 cup white sugar
1 egg
 
1/3 cup melted unsalted butter
1 pint heavy whipping cream
2 (8 ounce) packages cream cheese, softened
2/3 cup white sugar
2 teaspoons vanilla extract