You can sprinkle a little extra sugar or cinnamon on top before microwaving for added sweetness and flavor. Enjoy your quick and easy blueberry muffin!
In a microwave-safe mug, mix together the flour, sugar, baking powder, and salt until well combined.
Add the milk, vegetable oil or melted butter, and vanilla extract to the mug. Stir until the batter is smooth and all the dry ingredients are fully incorporated.
Gently fold in the blueberries into the batter.
Microwave the mug on high for 1 minute and 30 seconds to 2 minutes, or until the muffin rises and is cooked through. Keep an eye on it as microwave cooking times may vary.
Carefully remove the mug from the microwave (it will be hot!) and let it cool for a minute or two before enjoying your delicious blueberry muffin!