To make it use a boxed white cake of your choosing and make as per package instructions.
Then you will need:
1 8 oz. package of softened cream cheese
1 tub of cool whip
3/4 cup powdered sugar.
2 cans of cherry pie filling
Cream the cream cheese and powdered sugar together
Add the tub of cool whip and beat until creamy and mixed
Spread all over cooled cake.
Spread Cherry pie fill all over cake
Refrigerate until served.