Cream the butter and sugar, then add the eggs, cocoa and vanilla and mix until combined. Then add the flour and mix until combined, scraping down the sides. Mixture will be thick.
Heat your waffle iron and spray with cooking spray. Take a scoopful of batter and place in each waffle grid and lower the lid. Cook for approximately a minute or two. Every waffle iron cooks differently but you can pretty much smell when they're finished. Peel out with a fork.
Let cool on a rack and then spread chocolate frosting on top and sprinkle with chocolate chips if desired. ENJOY!!