Scandinavian fruit crumble

Melt the butter in a saucepan. Remove from the heat and leave to stand for 5 minutes. Mix the remaining ingredients in a bowl. Add the melted butter and mix together thoroughly. Refrigerate for a couple of hours. Put the fruit in a greased pie dish. Sprinkle the fruit with potato starch to soak up any excess liquid. Crumble the dough over the top. Bake in the centre of the oven at 200 °C for about 30 minutes.

Variations
Flavour the dough with 2 g ground cardamom.
Replace 1 dl of the flour with 1 dl oats.
If you’re making apple crumble, a delicious variation is to replace half the sugar with soft brown sugar. Try dipping the apple pieces in a little cinnamon before putting them in the tin. Chopped almonds taste great mixed with plums.