This recipe goes way back to the 60's or 70's and has always been one of my favorites. I am posting on Zaar so I can dispose of all of those hand written recipes which are scattered everywhere. I believe I got the recipe from one of my husband's aunts. I use Duncan Hines Lemon Supreme Cake Mix. The recipe calls for draining the crushed pineapple, but I always ignore this instruction. The filling will thicken properly with the juice. The recipe actually calls for pouring the juice on the cake before spreading the filling. I am sure either way is very good.