Ingredients
Method
- In a 10-ounce microwave-safe mug, whisk together the flour, sugar, cocoa powder, instant coffee, baking powder, and salt until no lumps remain.
- Pour in the milk, oil, and vanilla. Stir with a fork just until smooth, then fold in the chocolate chips if using. Do not overmix.
- Microwave on high for 60 seconds. If the center still appears wet, add 10 to 15 seconds. Let the mug cake rest for 1 minute, then serve warm straight from the mug.
Notes
Let the cake cool for a minute or two before eating. It will be molten hot right out of the microwave and sets up slightly as it sits.
