Preheat your waffle iron and spray it with nonstick spray. Cook about 1/3 cup of batter at a time, or whatever fits with your waffle iron. Close the lid and cook for 3-5 minutes, or until cooked through. Open the lid and let cool slightly before flipping out by inverting the waffle iron (carefully!) onto a flat surface. (The brownies are fragile while they’re still hot – however you get them out, be careful!)
Makes 6-8 Belgian-style waffles, each breaking into 4 wedges (about 2 dozen total).