1. Preheat oven to 375°. In a large mixing bowl beat butter and peanut butter with electric mixer on medium to high speed for 30 seconds until smooth. Add sugar, baking soda, and salt. Beat until combined, scraping sides of bowl. Beat in water, egg, and vanilla until combined. Beat in flour until combined. Beat in as much of the rolled oats as you can with mixer. Stir in chocolate chips and Cheerios.