Jello + Whipped Cream = Mousse
That's a very simple formula and taste good!
I simply use 1 pack of Jello powder,
melting it in 1/2 cup hot water,
after, adding 1/2 cup cold water
Whip about 1 cup of whipping cream,
stir everything together,
using a mode layer the mousse mixture and a slice of sponge cake,
repeating 2-3 times,
let it set in the fridge until set,
then you will have a nice simple mousse cake!