Combine all ingredients (except powdered sugar) in a large bowl and stir until well combined

(Adding cornstarch is optional, but I've found that it always makes cookies a tad bit chewier, which is exactly how I like my cookies)

Allow dough to chill in refrigerator for about 1 hour

Preheat oven to 350 F

Pour about 1/2 cup of powdered sugar into a bowl, and roll a spoon full of cookie dough in your hands to create a ball - dough wil be very sticky

Place dough in powdered sugar and roll around until coated

Place on greased cookie sheet and bake for 10-12 minutes

Allow to cool on pan completely before serving

Enjoy!