In a microwave-safe mug, add 4 tablespoons of all-purpose flour, 1 teaspoon of baking powder, and 1 tablespoon of granulated sugar. Whisk until well-blended and no lumps remain.

Pour in 3 tablespoons of milk, 2 tablespoons of vegetable oil, and 1/2 teaspoon of vanilla extract. Stir vigorously until the mixture is smooth.

Microwave the mug on high power for about 1 minute. Watch closely to prevent overflow.

Check the pancake by pressing lightly on the surface; it should feel firm and springy.

Allow to cool for a minute before adding your preferred toppings.