In a microwave-safe mug, mix together cottage cheese, almond flour, honey, cinnamon, baking powder, egg, milk, and vanilla extract until smooth.
Fold in the raisins if using, ensuring they are evenly distributed throughout the batter.
Microwave the mug on high for 1 to 2 minutes, or until the cake has risen and is cooked through.
Allow the mug cake to cool for a minute before enjoying it straight from the mug.
