Monster Cookie Bars are filled with old fashioned oatmeal, peanut butter, chocolate chips, and mini m&ms - and make the best treats. These easy bars are quick to make and require no chill time!
Course Dessert
Cuisine American
Keyword monster cookie bars
Prep Time 15 minutesminutes
Cook Time 25 minutesminutes
Total Time 40 minutesminutes
Servings 16bars
Calories 355kcal
Author Sue Ringsdorf
Ingredients
6Tablespoonsunsalted butter- softened
1 ¼cupbrown sugar (275 grams)
1/2cupgranulated sugar (100 grams)
2largeeggs
1cuppeanut butter (270 grams)
1teaspoonvanilla extract
1 ½teaspoonsbaking soda
3cupsold fashioned oatmeal (240 grams)
1/2teaspoonkosher salt
¾cupmini chocolate chips
¾cupmini M&Ms
Instructions
Prep. Preheat your oven to 350 degrees. Prep a 9×13 pan with parchment paper, if desired. You can also just spray the pan with baking spray.
Mix. In a large standing mixer, cream the butter and sugars together. Add the eggs, peanut butter, and vanilla, and mix again. Then add the dry ingredients – the baking soda, kosher salt, and oatmeal – and mix again. Finally, fold in the chocolate chips and M&M's. I normally do this by hand.
Spread the cookie mixture evenly into all sides of the pan. Press down gently to get a uniform layer.
Bake for 25 minutes or to your liking. If you want them more gooey, bake for less time. Let them cool for about 10 minutes if using parchment paper (and if you want to lift them out of the pan).
Serve bars with a scoop of ice cream or with a tall glass of milk!
Notes
Storing – Place bars in an airtight container and store on the counter for three to four days.
Freezing – You can freeze these for up to two months. But I suggest either eating them or sharing them with neighbors and friends instead! I actually love sending goodies to Mike’s work and they get devoured quickly.