Steps
In a microwave-safe mug, mix the flour, cocoa powder, sugar, baking powder, and salt until well combined.
Add the milk, vegetable oil, and vanilla extract. Stir until you have a smooth batter.
Microwave on high for about 1 minute. Check if it’s cooked through; if not, microwave in 10-second intervals until done.
Let it cool for a minute before enjoying your delicious mug cake!