Preheat oven to 350 degrees F.
Either lightly grease or line cookie sheets with parchment paper or use the Silicone Baking Mats to prevent the cookies from sticking.
In a very large bowl, combine the brown sugar, granulated sugar, and the vegetable oil; mix well. Add eggs and vanilla extract; beat until well blended.
Sift in the flour and baking soda; add to the sugar mixture and mix thoroughly.
Add rolled oats, cereal (Corn Flakes or Rice Krispies), and nuts. Add either coconut, raisins, chocolate chips, and/or M&Ms; mix thoroughly.
Drop by rounded tablespoonfuls onto prepared cookie sheets.
Bake for aproximately 8 to 10 minutes or until light golden brown. Remove from oven and let cookies set on the cookie sheets for a few minutes to cool (they will fall apart when you try moving them if you don't let them cool slightly).
Remove from cookie sheets and let finish cooling on wire cooling racks.
* As you can see from my cookie photos, I like to mix it up a little!
Best Cowboy Cookies Recipe: https://whatscookingamerica.net/Cookie/CowboyCookies.htm