Preheat the oven to 350F / 180C.
Rinse and drain the beans.
Add all ingredients except for the chocolate to a bowl and mash using an immersion blender.
Melt the chocolate with a little bit of coconut oil in the microwave in 20-30s intervals. (you'll probably need to do it twice).
Add it to the black bean mixture and combine until you get a smooth, chocolatey, even mixture.
Line a baking pan with parchment paper and spread the mixture evenly.
Bake for about 20-30 minutes. I like to leave mine a little bit underbaked - I feel like it makes them fudgier.
Take out of the oven and let the brownie cool off before slicing.
Store in an airtight container in the fridge.
