Lingonberry Cake

Cake

 * 4½ dl (scant 2 cups) flour
 * 1½ dl (⅔ cup) sugar
 * 1 tablespoon baking powder
 * 150 g (5 ounces, scant ⅔ cup) unsalted butter
 * 1 egg
 * 2 dl (¾ cup) lingonberry preserves

Streusel topping

 * 1½ dl (⅔ cup) oatmeal
 * 3 tablespoons butter
 * 1 dl (½ cup) sugar
 * 1 teaspoon vanilla sugar

Directions

 * 1) Preheat the oven to 200°C.
 * 2) Combine flour, sugar, and baking powder then cut in the butter with pastry blender.
 * 3) Add the egg and mix.
 * 4) Spread into a greased pan.
 * 5) Spread the preserves over the batter.
 * 6) Bake 25 – 30 minutes.
 * 7) Cool in the pan.