I love angel food cake lemon bars. . .two ingredient Lemon Bars. 1 box angel food cake mix 2 cans lemon pie filling (the recipe originally called for only 1 can) Mix dry cake mix and cans of pie filling together in large bowl (I just mixed it by hand) Pour into greased baking pan. Bake at 350 degrees for 25 minutes or until top is starting to brown.