You’ll love these thick and chunky Monster Cookies! Made with a creamy peanut butter cookie dough, these Monster Cookies are packed with rolled oats, chocolate chips and M&M candy.
I have a new weakness.
Monster M&M Peanut Butter Cookies. Have you had a Monster Cookie before? They’re lumpy, chewy and oh-so-irresistible.
They aren’t so well known here in Australia, but let me tell you, they are an American delight. Filled with rolled oats, chocolate chips, M&M’s and peanut butter, there is SO much goodness in every single bite.
The best part about these cookies is their ridiculously chewy texture from the rolled oats, and yet the creamy peanut butter makes the cookie dough just about melt-in-your mouth.
Then there’s the burst of melted chocolate from the chocolate chips and the crunch of the M&M’s.
There is so much going on and yet the flavours and textures blend perfectly.
There’s only one rule – these Monster Cookies must be devoured with a cold glass of milk. I had to eat quite a few of these cookies, ya know, for recipe testing purposes, and I didn’t mind one bit.
These cookies have a different make-up to regular cookies, with substantially less flour. And the rolled oats offer a truly chewy texture, similar to Oatmeal Chocolate Chip Cookies.
One thing to note is that they will be very fragile when they come out of the oven so you need to let them cool completely.
They will firm up and develop into a deliciously chewy cookie. It’s worth the wait – trust me.
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Let’s Bake
Monster Cookies
Monster M&M Peanut Butter Cookies filled with rolled oats, chocolate chips, M&M’s and peanut butter, there is so much goodness in every single bite.
Ingredients
- 115 grams (1/2 cup or 1 stick) unsalted butter, room temperature
- 135 grams (3/4 cup) brown sugar
- 1 teaspoon vanilla extract
- 1 large egg
- 180 grams (3/4 cup) smooth peanut butter
- 70 grams (1/2 cup) plain flour or all purpose flour
- 1/2 teaspoon baking soda
- 1 teaspoon cornflour or cornstarch
- 1/4 teaspoon salt
- 100 grams (1 cup) rolled oats
- 100 grams (1/2 cup) M&M’s, plus extra for decorating
- 75 grams (1/2 cup) chocolate chips, plus extra for decorating
Instructions
- In a large mixing bowl, beat butter and sugar together with an electric mixture on medium speed until creamy and pale. Add vanilla and egg and beat until smooth. Add peanut butter and beat until combined.
- In a separate bowl, whisk together the flour, baking soda, cornflour, salt and oats. Add the dry ingredients to the wet ingredients and beat until combined. Add M&M’s and chocolate chips and mix briefly. Cover the bowl with plastic wrap and refrigerate for at LEAST one hour.
- Line two oven trays with baking paper. Preheat oven to 180 C (350 F) standard / 160 C (320 F) fan-forced.
- Grab cookie dough from the fridge. The dough will still be a bit sticky but it should be firm enough to roll balls using your hands.
- Line the balls (approximately 1 heaped tablespoon) of cookie dough onto the prepared trays and then flatten slightly using your hand or a spatula, as they wont spread out as much as a normal cookie would. Press a few extra M&M’s and chocolate chips on top.
- Bake the cookies for approximately 12 minutes or until golden brown on the edges. Leave the cookies to cool slightly before gently moving to a wire rack to cool completely.
Natalie says
I love monster cookies! They’re my favorite ever since I was a child. These look amazing!
Jessica Holmes says
Thanks Natalie – aren’t they the best?!
Josh says
Yum!
Pete says
How large do you make the dough ball? What thickness do you flatten it to?
Jessica Holmes says
Hi Pete, thanks for stopping by. This recipe makes about 15 cookies, so about a tablespoon of dough should be about right but it’s really up to you how big or small you would like your cookies to be. Just flatten the balls of dough so they are no longer round – again its really up to you how thin or thick you would like them. You can always bake one cookie and see how much it spreads out and then bake the rest. Hope that helps!
Jessica Holmes says
Ooh you totally need to have one! I’m addicted now! 😉
Malinda says
You’re right, I’ve never heard of these before and now that I have, just call me cookie monster!!! These wouldn’t last the day in my house. Definitely pinning for later.
Jessica Holmes says
Hahaha I felt the same way Malinda! I hope you get a chance to try them! 🙂
Hayley says
Monster cookies are easily a favorite of mine. It’s impossible not to like how thick and chewy they are! Love your version with the bright, colorful M&M’s!
Jessica Holmes says
Tell me about it, I’ve been missing out ALL these years! Thanks Hayley!
Lynn says
I just watched the Pioneer Woman make these on TV right before I saw this post. I think the universe is trying to tell me something…
Jessica Holmes says
No way! Haha, I think you need to try them! 😉
Beeta says
Oh yeah, peanut butter cookies loaded with m&ms? YUM – count me in! They look so chewy, I can practically taste the texture just by looking at the photos. Bravo, Jess!! <3
Jessica Holmes says
Thanks so much Beeta! Yess they are loaded with ALL the good stuff in life! 🙂
Leah says
I totally agree with you on the monster cookies — easily one of the best cookies out there!! These look so delicious! Going to have to gluten-freeify these and give them a shot. YUM!
Jessica Holmes says
Definitely do Leah! They don’t have too much flour in them 🙂
Sues says
These would totally be a weakness of mine, too!! They’re super pretty and I can tell they’re incredibly delicious!
Sues
Jessica Holmes says
Thanks Sues! 🙂
Kelly says
These cookies are amazing! Love how thick and chewy they are!
Jessica Holmes says
Thanks Kelly! So thick and chewy!
Ella says
If my daughters would see these.. they would ask some right away 🙂 Look wonderful
Jessica Holmes says
Thanks Ella, I’m right with your daughters! I want to make another batch 😉
Jessica says
Yummy, yum! These look pretty and delicious! I love me a nice chewy cookie, especially if it has so many delicious flavors!
Jessica Holmes says
Thanks Jessica! I love chewy cookies too!
GiGi Eats says
OH MY WORD! That’s all I can say here!
Jessica Holmes says
Thanks so much Gigi!
Amy says
Monster cookies! I think I’m enough of a cookie monster to handle a few of these with a glass of milk. Packed with all of my favourite things, and easy to make gluten free too! I cannot wait to get my hands full of these delights!
Jessica Holmes says
Hahaha cookie monster indeed. You definitely should try making a GF version Amy! There’s not much flour in them to begin with and they are oh-so-delicious!