Oatmeal chocolate chip cookie in a mug

(modified from http://www.504main.com/2013/02/oatmeal-crunch-cookies-in-cup-recipe.html)

• 1 TBS butter or margarine, melted
• 1 TBS sugar
• 1 TBS brown sugar
• 1/4 tsp vanilla
• 1 egg yolk
• dash salt (optional)
• 3 TBS flour
• generous sprinkle of cinnamon
• 2 TBS oatmeal
• 1 TBS chocolate chips

Melt butter in mug.  Add sugars and mix.  Add vanilla, salt, and egg yolk and mix.  Add flour and cinnamon and mix.  Add oatmeal and mix.  Add chocolate chips and mix.  Microwave 40 seconds and check for doneness.  Takes about 55 seconds total.