Preheat your oven for a classic flourless Monster Cookies recipe that’s been in my family for more than two decades.
Chocolatey, chewy, peanut buttery goodness. There’s no better way to describe this tried and tested family recipe for Monster Cookies.
My mom got this recipe from a friend more than 25 years ago, and it’d be impossible to count just how many dozens of Monster Cookies have been baked and enjoyed since that glorious recipe exchange.
These cookies became a staple of mine when I was in college and grad school, and to this day, I’m remembered for their impossibly chewy and soft texture, and of course their unbeatable taste.
My husband jokes that these are a healthy dessert, courtesy of the lack of flour and addition of oats and peanut butter. While “health food” may be a stretch, you can guarantee they are a crowd-friendly dessert. (But if you are looking for a healthy sweet, don’t miss my famous 5-Minute Frozen Yogurt!)
The creepy candy eyes are an optional addition, but they’re a festive decorative touch in October when all things Halloween rule the food scene.
No stand mixer? No problem! I made these cookies dozens of times all through college sans mixer. (Consider the stirring your workout for the day.) And both smooth and chunky peanut butter will work, but I love the added crunch that chunky offers.
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packed light brown sugar
(1 stick) unsalted butter, at room temperature
peanut butter (smooth or chunky)
oats (Old Fashioned or Quick)
- Candy eyes (optional)
Pre-heat the oven to 350°F. Line two baking sheet with parchment paper or Silpat baking mats.
In the bowl of a stand mixer fitted with the paddle attachment, cream together the sugar, brown sugar and butter until light and fluffy.
Beat in the eggs, one at a time, and then beat in the peanut butter, vanilla, baking soda and salt until well combined.
Add the the oats and mix until combined, then add the mini M&Ms and mini-chocolate chips.
Scoop 2-to 3-tablespoon mounds of the dough onto the prepared baking sheets, spacing the mounds at least 2 inches apart.
Bake the cookies for 12-15 minutes then remove them from the oven and allow them to cool for 5 minutes on the baking sheets before transferring them to a rack to cool completely. (See Kelly’s Note.)
The best way to guarantee your cookies are chewy and not too crispy is to underbake them slightly then remove them from the oven and allow them to cool for 5 to 10 minutes on the baking sheets.
If you’re using the candy eyes, add them to the cookies immediately after you remove them from the oven.
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Amount Per Serving
Calories from Fat 153
% Daily Value*
Total Fat 17g
Saturated Fat 6g
Total Carbohydrates 41g
Dietary Fiber 2g
* Percent Daily Values are based on a 2000 calorie diet.