This peanut butter mug cake recipe is moist, fluffy, and full of rich peanut butter flavor. Made with just 3 ingredients, it takes less than a minute to bake.
In a small mixing bowl, combine the peanut butter, sugar, and egg until smooth.
Transfer your mug cake batter into a greased microwave-safe ramekin or cereal bowl (at least 6 inches wide). Microwave for 45 seconds to a minute. If it still isn't done, microwave in 10-second increments. Remove from the microwave and let sit for a minute before eating.
Oven Instructions
Preheat the oven to 180C/350F. Grease an oven-safe ramekin (6-8 inches) with oil. Make the batter before transferring to the ramekin. Bake for 8-10 minutes.
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Notes
Tips: See my recipe tips above for making the best peanut butter mug cake.
Baking powder: Optional; feel free to add half a teaspoon.