{One-Bowl, Big-Batch} Monster Cookie Bars ~ loaded with chewy oats, decadent pea…

{One-Bowl, Big-Batch} Monster Cookie Bars ~ loaded with chewy oats, decadent peanut butter, colorful M&Ms, chocolate chips, and peanut butter chips, this effortless recipe whips up in no time! It is then spread in a large rimmed sheet pan to yield a big batch of bar cookies, perfect for sharing or serving at parties. Even better, you can customize these yummy bar cookies for various holidays by using seasonal M&Ms! | FiveHeartHome.com

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