1/4 cup butter
1 1/2 cups white sugar
1 (16 ounce) can cherry pie filling
1 (8 ounce) package cream cheese
1 (3 ounce) package instant cream cheese
1 tablespoon cream of tartar
1 (8 ounce) container frozen whipped topping, thawed
Preheat oven to 350 degrees F (175 degrees C). Lightly grease a 9 inch pie pan.
In a large bowl, cream together the butter, sugar and pie filling. Beat in the cream cheese, cream of tartar and whipped topping. Pour mixture into pie pan.
Bake in preheated oven for 50 minutes, or until toothpick inserted into center of the pie comes out clean. Cool before cutting into squares.