In your favorite microwave-safe mug, combine 4 tablespoons of all-purpose flour, 4 tablespoons of granulated sugar, and 2 tablespoons of cocoa powder. If you choose to use a pre-packaged brownie mix, add 2 tablespoons to the mixture.
Pour in 3 tablespoons of milk and 1 tablespoon of melted butter. Add ¼ teaspoon of vanilla extract. Stir thoroughly until you have a smooth batter with no lumps.
Place your mug in the microwave. Cook on high for 60-90 seconds. Begin with 60 seconds and check the consistency—if necessary, continue in short bursts.
Let your creation cool for a minute or two. Enjoy it straight from the mug or transfer it to a plate for a more refined presentation.
