Many of you asked for the recipe of the vegan chocolate brownies that were apparently based on kidney beans, apple, banana, and oats. Here we go:
I followed the recipe by "cake INVASION!". But I replaced parts of the sugar(s) with sweetener and a banana, left the chocolate frosting off and added some peanuts. Also I replaced the apple pulp by simply blending in a fresh apple. Because the banana added additional liquid, I reduced the amount of plant milk.

Process:

1. Blending oats in blender, putting them in bowl. Soaking Chia seeds in 3 table spoons water. Dissolve sweetening pills in water, Preheating oven to 175 degree celsius (two-sided heat).
2. Blending all wet ingredients together (beans, banana, apple, oat milk, chia seeds, sweet water, oil...)
3. Mixing all dry ingredients into bowl (blended oats, backing powder, sugar, vanilla sugar, cacao powder...)
4. Mixing blender content with bowl content (either in strong blender or by hand)
5. Put on baking sheet (apply oil before!) and bake for 25 minutes (testing if it is done by stick poking does not work with brownies)
6. Let cool down 
7. Eat