Sugar Cookies make the best Christmas Cookies, so my Mug Sugar Cookies make the best festive treats for that sugar cookie recipe fix in just a few minutes.
Place butter in the mug and melt in microwave (about 30 seconds).
Add sugar and stir together.
Mix in the egg yolks, thoroughly.
Stir in flour, salt and sprinkles, until combined.
Divide the mix between two mugs.
Top with sprinkles and cook in the microwave separately for about 45 seconds - 1 minute. (This timing is based on my 1200W microwave so check the wattage of your timing may vary)
Serve with a little buttercream frosting on top and enjoy!
Recipe Notes
If you just want to make 1 cookie then 1/2 the recipe.