Preheat the oven to 350℉. Spray a 9 x 13" pan with baking spray with flour.
In a medium bowl combine the Devil's food cake mix, cherry pie filling, and vanilla extract. Mix until all of the cake mix is moistened. Spread batter into the prepared baking pan.
1 15.2 ounce package Devil's food cake mix, 1 can 21-ounces cherry pie filling, 1 teaspoon pure vanilla extract
Bake for 25 - 30 minutes until the top springs back when touched. Make the chocolate frosting and spread it over warm cake.
CHOCOLATE FROSTING
Combine sugar, milk, and butter in a saucepan. Bring to a boil and boil for one minute, stirring constantly.
1 cup sugar, ⅓ cup milk, 5 tablespoons butter, 1 cup semi-sweet chocolate chips
Remove from heat and stir in chocolate chips until melted.