Ingredients:
• 12 ounce (340 g) mug
• 2 tablespoons vegetable oil
• 2 tablespoons water
• Few drops of vanilla extract
• Dash of salt
• Pinch of instant coffee
Method:
- Whisk all the ingredients together.
- Whisk in 3 tablespoons of sugar.
- Whisk in 2 tablespoons of unsweetened cocoa powder.
- Last, whisk in 2 tablespoons of flour, mix well.
- Put in the microwave for 60 – 75 seconds.
- Serve with a scoop of ice cream, if desired.
http://www.chow.com/food-news/81197/how-to-make-a-brownie-in-a-mug-in-the-microwave/