Lingonberry Cake

Ingredients

 * Cake:


 * 4 1/2 dl (scant 2 cups) flour
 * 1 1/2 dl (2/3 cup) sugar
 * 1 tablespoon baking powder
 * 150 g (5 ounces, scant 2/3 cup)
 * unsalted butter
 * 1 egg
 * 2 dl (3/4 cup) lingonberry preserves


 * Streusel topping:


 * 1 1/2 dl (2/3 cup) oatmeal
 * 3 tablespoons butter
 * 1 dl (1/2 cup) sugar
 * 1 teaspoon vanilla sugar

Directions

 * Preheat the oven to 200 degrees C.
 * Combine flour, sugar, and baking powder then cut in the butter with pastry blender.
 * Add the egg and mix.
 * Spread into a greased pan.
 * Spread the preserves over the batter.
 * Bake 25-30 minutes.
 * Cool in the pan.