In a microwave-safe mug, combine cottage cheese, almond flour, egg, sweetener, ground cinnamon, baking powder, and vanilla extract. Whisk until smooth.

Melt butter or oil in the microwave for 20-30 seconds and stir into the batter.

Microwave the mug on high for 1 minute, watching closely to prevent overflow.

Check doneness by pressing the top; it should feel firm. If needed, microwave an additional 10-15 seconds.

Let cool for a couple of minutes before enjoying directly from the mug or transferring to a plate.