Preheat the air fryer to 350℉ (176℃). Divide the melted butter between two ramekins.
Add flour, sugar, baking powder, and sprinkles to a liquid measuring cup and whisk to combine. Then, add the milk and vanilla extract. Stir to combine, careful not to overmix the batter.
Divide the batter into the prepared ramekins. Wipe down the sides of the ramekins and cook for 6-8 minutes or until the center is set (depending on the strength of your air fryer).Tip: Insert a toothpick into the center of the cake. It should come out clean.
Let the mug cake cool before adding your frosting, or leave it unfrosted.
Stir the ingredients thoroughly to ensure they are well combined and that the batter is smooth.
Use a toothpick or a fork to check if the mug cake is done. If it comes out clean, the mug cake is ready.
Nutrition Disclosure:
The nutritional information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for professional advice.