4 Ingredient Gluten FreePeanut Butter Cookies

2 cups peanut butter (creamy or crunchy)

2 cups sugar (plus additional sugar to press cookies flat)

2 eggs

2 Tbsp. vanilla

½ cup butter

1/3 cup milk

4 Tbsp. unsweetened baking cocoa

1 lbs powdered sugar

1 Tbsp. vanilla