A dark, moist chocolately treat.
Preheat oven to 350°F. Spray a 9-inch baking pan with nonstick cooking spray. Place black beans in a mixing bowl. Add the sugar, oats, cocoa powder, olive oil, espresso powder, flax seed, vanilla, and salt. With an electric mixer blend the ingredients until the black beans are mushed up and the mixture is smooth, about 2 minutes. Scrape batter into the prepared pan and bake for 30 to 35 minutes until the edges pull away from the sides of the pan and the middle of the brownies is firm. Let cool before slicing into 16 pieces.