4 env. Knox unflavored gelatin
3 (3 oz.) boxes Jello (any flavor)
4 c. boiling water

After water boils, stir Knox and Jello together until dissolved. Remove from heat. Pour in 1/2 inch tall (or higher) pan 9 x 13 inch. You may use pie pans as well as square baking dishes. Let set. Cut into blocks. Serve chilled.