Mix the dry ingredients in a cup, add the wet ingredients and stir until no big lumps are left. Then stir in the chocolate and bake in the microwave up to one minute.
Tipps/Notes
The brownie is done, when the microwave is full of steam. Don't let it run longer than a minute, so the brownie doesn't get too dry. You can easily make your own vanilla extract.
Recipe by Blueberry Vegan at https://www.blueberryvegan.com/de/schneller-tassenkuchen-brownie/