- 1 tbsp unsalted butter melted
- 3 tbsp all purpose flour
- 2 tbsp granulated white sugar
- 1 tbsp whisked egg
- 1 tbsp sprinkles
Combine all ingredients except sprinkles into a mug or small bowl, mixing with a small whisk until a smooth dough forms. Stir in half of the sprinkles.
Line a medium-sized microwave-safe plate with parchment paper. Scrape out dough into the middle of the parchment paper. Shape dough to resemble a cookie shape (like a thick round disc).
Add remaining sprinkles to surface of the cookie. Microwave for approximately 50 seconds. You cookie might be done slightly sooner, but I don't recommend more than 50 seconds as it will turn the cookie hard and brittle. Cookie is best consumed right away.