1 vanilla boxed cake mix
2 raspberry or cherry jelly powders
Bake cake mix in rectangular pan according to instructions on box. Be sure that you oil and flour the pans so that the cake will come out easily. Cool cake before proceeding to next step.
Remove cake from pan and slice in half horizontally. Layer bottom with jam and put top layer back onto cake. Slice cake into 1 inch x 1/2 inch slices.
Prepare 2 batches of custard according to instructions on the tin.
Prepare jelly powder according to instructions on the box.
In a large bowl put one layer of the cake in the bottom. Drench with jello mixture until wet. Layer custard over top. Repeat these steps until the bowl is full.
Whip cream and spoon over trifle. Add chopped walnuts to top of the bowl. Chill until served.
Note: The trifle is best eaten the date of preparation.