In a microwave-safe mug, add the all-purpose flour, baking powder, and granulated sugar. Mix thoroughly until well combined for a smooth and consistent batter.

Pour in the milk, vegetable oil, and vanilla extract. Stir gently until the mixture is completely smooth, with no lumps remaining.

Place the mug in the microwave and cook on high for 1 minute. Continue microwaving in 10-second intervals until it feels firm to the touch.

Once your pancake is cooked, allow it to cool for a minute or two before enjoying.