In a microwave-safe mug or ramekin, mix mashed banana, cottage cheese, egg, vanilla, and maple syrup (if using) until smooth.
Add almond flour, baking powder, cinnamon, and salt. Stir until fully combined.
Microwave on high for 1½ to 2 minutes, or until the center is set. Time may vary based on microwave power.
Let cool slightly. Add your favorite toppings like banana slices or chopped nuts.
Enjoy warm with a spoon!