
Thick and Chewy Monster Cookies
Ingredients
- ½ cbutter
- ½ cgranulated sugar
- ½ clight brown sugar
- ½ cpeanut butter
- 1egg
- 1 tspvanilla extract
- 1 call-purpose flour
- 1 ¼ cold-fashioned rolled oats
- ¼ tspsalt
- ½ tspbaking powder
- ½ tspbaking soda
- ¾ cm&m candies
- ½ csemi-sweet chocolate chips
Directions
- 1
Preheat oven to 350 degrees F.
- 2
Cream the butter and sugar together really well—at least 2-3 minutes until light and fluffy.
- 3
Add peanut butter and mix well. Add egg and vanilla and mix.
- 4
In a separate mixing bowl stir together the flour (be careful to measure correctly, spooning the flour into a measuring cup, then leveling off), oats, salt, baking powder and baking soda.
- 5
Add to the wet mixture and mix to combine. Stir in chocolate chips and M&M’s.
- 6
Bake at 350 degrees for 10-12 minutes, or a little longer if you make them bigger than a 1 inch cookie scoop. Don't over bake--they will look just set.
- 7
Remove them from the oven and allow them to cool completely on the pan.

Thick and Chewy Monster Cookies
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About this Recipe
Craving a cookie that truly delivers on its promise of decadent flavor and satisfying texture? These Thick and Chewy Monster Cookies are an absolute triumph, packed with everything you love in a classic treat, ready in just 25 minutes.
Why This Recipe Works
What sets these Monster Cookies apart is their irresistible combination of textures and tastes. The balanced blend of butter, sugars, and peanut butter creates a rich, tender dough that bakes up wonderfully thick, while the generous addition of old-fashioned rolled oats ensures that signature chewy bite. Every cookie is loaded with a delightful mix of M&M candies and semi-sweet chocolate chips, guaranteeing a burst of color and chocolatey goodness in every mouthful.
What to Expect
You can expect a deeply satisfying cookie experience. Each bite delivers a harmonious blend of sweet, salty, and nutty notes from the peanut butter, softened by the classic vanilla. The texture is perfectly balanced—crisp around the edges, yet wonderfully soft and supremely chewy in the center. The M&Ms add a fun candy crunch, contrasting beautifully with the smooth melt of the chocolate chips. These substantial cookies are a guaranteed crowd-pleaser, always a huge hit with family and friends.
Customization & Variations
These Monster Cookies are wonderfully versatile. Feel free to swap the semi-sweet chocolate chips for milk chocolate, dark chocolate, or even white chocolate to match your preference. For an extra festive touch, you could use holiday-themed M&M candies. If you're looking to enhance the texture, consider adding a sprinkle of chopped pretzels for a salty crunch, though the recipe is perfect as is.
Serving & Context
These Thick and Chewy Monster Cookies are ideal for any occasion, whether it's a casual weeknight dessert, a party platter, or a bake sale. Serve them with a cold glass of milk for the ultimate comforting treat that everyone will adore.

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