6-8squaresleftover Brownies (about 300g) we use Vanessa's Brownie recipe. You could substitute other brownies or cake, but why not make extra brownies to take to someone as a gift
For the Raspberry Layer
400gfresh or frozen raspberries
3tablespooncastor sugar
4tablespoonGran Marnier or other orange liquor
For the Chestnut Mousse Layer
400gchestnut purreeI buy this in ready made packs from the supermarket. You can also get it in tins