3 tablespoons Semi-sweet, dark, white, or milk chocolate chips
1/8-1/4 teaspoon vanilla
Topping of your choice: glaze, frosting, ice cream, or whipped topping
Add all of the dry ingredients to a large (12-14 ounce) mug and mix making sure to level each tablespoon of flour, sugar, and cocoa.
Add the egg and combine well with a fork. Mixture will become stiff.
Stir in milk and oil.
Add chocolate chips and vanilla. Stir well.
Place the mug in the center of your microwave and cook for: 700 watt oven 4:00, 900 watt oven, 3:30, 1000 watt oven 3:00. (Don't worry if the cake expands past the top of your mug. The cake will shrink back into the mug when the cooking stops.)
Remove from the microwave oven. Eat the cake hot, warm, or cold in the mug, or turned out onto a saucer.
Top with the topping of your choice: frosting, ice cream, whipped topping, or powdered sugar.