Ingredients

Instructions

  1. Spray microwave safe coffee mug with vegetable oil spray.
  2. Place butter in the mug & melt in microwave (about 30 seconds).
  3. Add sugar, vanilla and salt and stir together.
  4. Add the egg yolk, mixing thoroughly.
  5. Add flour and stir until combined.
  6. Top with sprinkles and cook in the microwave for about 40-45 seconds. Check for doneness with a toothpick.