3 sm. boxes Jello, any flavor
3 env. Knox gelatin
3 c. boiling water
1/2 pt. heavy cream

Mix the Knox gelatin and the Jello. Add boiling water. Stir until dissolved. Stir in 1/2 pint heavy cream. Pour into a dish (11 x 7 inch works well). Let stand at least 4 hours before cutting into squares.