Melt the Butter (1 tablespoon) in the Panasonic Microwave Oven for 30 seconds in a microwave-safe mug.
Add Vanilla Extract (1/4 teaspoon) and Granulated Sugar (2 tablespoon) and mix until combined.
Add the yolk of the Egg (1) the cup and mix until combined.
Add All-Purpose Flour (3 tablespoon) and continue to mix.
Add Sprinkles (1/2 teaspoon).
Cook in the Panasonic Microwave Oven for about 45 seconds. Enjoy! Cooking results may vary depending on microwave oven used.