In a small cereal bowl, melt two tablespoons of butter in the microwave for about 15 seconds.
Once melted, mix in one tablespoon of sugar, one tablespoon of brown sugar, a quarter teaspoon of vanilla extract, and one egg yolk.
Whisk the ingredients together until they are well combined.
Stir in two heaping tablespoons of all-purpose flour and whisk again until everything is incorporated.
Add chocolate chips to the mixture, adjusting the quantity to your liking.
Microwave for one minute, stopping halfway to check on it.
