What you need:
4 cup flour
1 1/2 cup sugar
2 teaspoon baking powder
1 teaspoon vanilla powder
100 gr butter
1 eggs
5 dl blueberry
2 tablespoon cinnamon
2 tablespoons sugar

What to do:
Rinse the blueberries and mix with cinnamon and 2 tablespoons sugar. Mix the remaining ingredients into a crumbly dough. Grease a cake tin. Press out half of the dough into the bottom, add the grated blueberries in between and finish with the dough crumbled over. Baka i 200 degrees around 30 minutes.