The easiest cookie I know is to get Funfetti cake mix and follow the cookie recipe in the side. I think you need like one egg and the cake mix is about a buck. They just started making Funfetti Cookie mix but it cost more for the same thing. They are super good. You can put icing on them too if you want.
The best cookie recipes include the Vegan Brownies, Classic Peanut Butter Cookies, Burrebrede and Julia's Best Ever Chocolate Chip recipe. Others include Mom's Ranger recipe and Almond Shortbread II. Get the full recipes at http://allrecipes.com/recipes/desserts/cookies/.