Ingredients:
250 g acid apple
250g of flour
125g sugar
1-teaspoon baking powder
100g hard butter
1 egg
1 pinch of salt
Preparation:
Put all the ingredients in a food processor (except the sauce) and run it until you get fairly coarse sandy crumble.
In a pie mold, place half of the crumble, add the sauce over it and cover with the rest of the crumble.
Bake at 180 C until the cake is golden (around 30 minutes).