Crumble cake with blackberry

I will rowing a sunrise tour tomorrow morning on the Fjord of Vejle. After the rowing tour we will enjoying breakfast together. I have been asked, if I could bring a cake for this breakfast session, so I have baked a blackberry version only of this crumble cake with blackberry and apples.

Crumble cake with blackberry:

• 400 g blackberries
• ½ teaspoon vanilla sugar
• 100 g butter
• 50 g wheat (cake) flour
• 100 g oat flakes
• 3 tablespoon sugar

1. Heat up the oven to 200'C
2. Place the blackberries into a small oven stable tray.
3. Sprinkle the vanilla sugar on top of the blackberries.
4. Melt the butter.
5. Mix flour, oat flakes and sugar into the melted butter.
6. Spread this crumble layer on top of the blackberries.
7. Place the cake in the upper part of the oven.
8. Bake the cake at 20-25 minutes at 200'C.
9. Cool down the cake prior to serving.
10. The cake could be served with sour cream or whipped dairy cream.