Prepare the rice pudding according to the instructions on the packet, then let it cool down.
Make a batter from the dough ingredients and spread the dough on a baking sheet lined with baking paper. Bake at 180 ° C (convection 160 ° C, gas level 3) for 20 minutes. Take out of the oven and spread the rice pudding on top. Bake for 10 minutes, then take out and let cool.
Prepare a cake topping with sugar and stir in the raspberries. Spread the mixture on the rice pudding layer and cool the cake until ready to eat.