In a small greased/oiled bowl or mug, whisk together your dry ingredients above.
Next add your butter, egg yolk, heavy cream and extracts. Mix well until a thick batter forms. Add your sprinkles.
Smooth out the top as best as you can and microwave for 1min. (Depending on your microwave it will take more or less time, start on the lower end with 45s if your microwave tends to bake hot, if your microwave works slow like mine then you may need 1min 15s total).
Whisk together the frosting ingredients above and top your Keto Funfetti Mug Cake OR top the warm cake with ice cream and/or homemade whip cream. Enjoy immediately!
Alternatively you can place this in the fridge to cool and eat it later. I also enj