1. Spray a large mug or ramekin with a non-stick coating spray. Add the flour, sugar and baking powder and stir well.  Mix in the milk, oil and almond extract. Sprinkle the cinnamon on top and mix it into the batter with a fork.  

2. Microwave the mug cake for 60 seconds or until a toothpick inserted in the middle comes out clean. Depending on the wattage of your microwave you may have to microwave it up to 75 seconds.  Remove from microwave and allow it to cool for a few minutes while you prepare the icing.  

3. Add the powdered sugar, vanilla and milk to a small mixing bowl and stir until well combined. If the icing is too thick to your liking, add another tablespoon of milk. If it is too thin, add 2 tablespoons of powdered sugar.   

4. Drizzle the icing on top of your king cake. Before the icing hardens, sprinkle the purple, green and yellow sugared crystals on top of the icing.