I use the costco cocoa powder..recipe on the back and it takes a solid cup of fat. I use coconut oil but infused butter packs some punch too.
The last batch was made with butter as per the recipe (1 cup of butter).
The butter was 4 oz of stuff (buds, frosty trim etc) decarbed into 2 1/2 cups of butter
I made caramel out of it and used it as the drizzle icing (1 cup)
1 of those big pieces is a lot i find a quarter of a brownie comes on really nice and hard..