Healthier Flourless Monster Cookies | Ambitious Kitchen

Healthier Flourless Monster Cookies | Ambitious Kitchen

12 mins read

Growing up I was always around kiddos, which definitely helped prepare me for motherhood. One of my first jobs in high school was working at a daycare, and after high school, I took up a few nanny jobs. Anytime I babysat on the weekends, I’d have baking parties with the kids and always made these healthy monster cookies because I wanted the kids to have a treat that still felt like a real deal kind of cookie, but had more protein, complex carbs and healthy fats.

The verdict? Kids LOVED them! And fast-forward many years and 3 of my own kiddos later, we still bake these up together for weeknight treats.

Whether or not you have kids, these deliciously chewy, easy monster cookies make the perfect dessert for busy weeks. Bonus points if you serve them up on Halloween!

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What makes these monster cookies healthy?

  • They’re packed with protein & healthy fats: peanut butter makes up most of this recipe so you get in protein & healthy fats for a little nourishment without using tons of extra oil. Each cookie has almost 5g of protein — whoo hoo!
  • They’re flourless: that’s right, these healthy monster cookies are made without any flour. The peanut butter and oats hold together very, very well even without any traditional flour. They’re also gluten free as long as you use certified gluten free rolled oats!
  • They have a boost of fiber: the rolled oats in these cookies add a wonderful boost of fiber for a super satisfying treat.

mixing dough for flourless monster cookies

Everything you’ll need to make these healthy monster cookies

These delicious flourless monster cookies use super simple ingredients that you probably have in your pantry. Of course, I still kept the chocolate chips and candy pieces because it’s not a monster cookie without them. I also added nuts for some additional flavor and healthy fats and shredded coconut for amazing texture. Feel free to get creative with the mix-ins, too! Here’s what you’ll need:

  • Peanut butter: use an all natural, drippy peanut butter that’s made just with peanuts + salt. You can also use an all natural crunchy peanut butter or any nut or seed butter you’d like.
  • Butter: for a little extra moisture. You can use regular butter, vegan butter, ghee or coconut oil.
  • Brown sugar: the delicious molasses flavor of brown sugar makes these cookies irresistible. You can also use coconut sugar.
  • Eggs: you’ll need 2 eggs for this recipe. I also think that flax eggs will work fine, just note that they’ll be a bit more fragile.
  • Vanilla: for a little boost of flavor.
  • Oats: be sure to use rolled oats (not steel cut) and feel free to use a gluten free kind.
  • Cinnamon: I like to add a pinch of cinnamon for a cozy flavor but this is optional.
  • Baking soda: so that these cookies bake properly.
  • Mix-ins: I packed these babies with chocolate chips, M&M’s, shredded coconut and chopped pecans. But you can really add any mix-ins you like!

If you don’t want to use M&M’s try using the Little Secrets candy instead. They’re really, really good and don’t use any corn syrup, dyes or artificial flavors.

healthy monster cookie dough in a bowl

Customize your monster cookies

  • Make them vegan: try using a flax egg to make these vegan! They just might be a little more fragile so let them rest on the baking sheet a bit longer before removing them. You’ll also need to use dairy free/vegan chocolate chips and vegan chocolate candies instead of M&M’s.
  • Reduce the sugar: if you’re watching your sugar intake, I have instructions for easily reducing the brown sugar. You can also used an unrefined sweetener like coconut sugar, and can always leave out the candy pieces.
  • Choose your fav add-ins: traditional monster cookies have both M&M’s and chocolate chips in them, but you can feel free to add your favorite nuts, dried fruit, or even do a chocolate drizzle. YUM.

unbaked healthy monster cookies on a baking sheet

Can I make them nut free?

Sure! Try subbing in sunflower seed butter or pumpkin seed butter. Sometimes sunflower seed butter causes baked goods to turn green FYI; they’ll still be good to eat though.

Healthy monster cookies in 3 simple steps

  1. Mix the wet ingredients. Mix together the peanut butter, butter, brown sugar, eggs, and vanilla until nice and smooth.
  2. Add the dry ingredients. Stir the dry ingredients right in the same bowl, then fold in all of your mix-ins.
  3. Scoop & bake. Use a large cookie scoop to scoop the dough and space the dough balls onto your prepared cookie sheet. Add a few M&M’s on top of each dough ball, then bake them up until golden brown on the edges. Cool and devour!

gluten free monster cookies on a wire rack

Choose your cookie thickness

Like thinner cookies? After adding the dough to your cookie sheet, gently flatten the tops of the dough balls before baking. Like thicker cookies? Simply add the dough balls to your cookie sheet and bake them as is!

healthy monster cookies on a plate

How to store and freeze monster cookies

  • To store: feel free to keep these healthy monster cookies in an airtight container at room temperature for 1-2 days, then transfer to the fridge or freezer.
  • To freeze: make sure the cookies are completely cooled, and then transfer them to an airtight container lined with wax or parchment paper or freezer-safe bag before storing them in the freezer for up to 2 months. I like to place them in a single layer to avoid any cookies breaking. Once ready to eat, simply thaw out at room temperature and enjoy!

healthy monster cookies in a stack

More cookie recipes to try

Get all of my cookie recipes here!

I hope you love these healthy flourless monster cookies! If you make them be sure to leave a comment and a rating so I know how you liked them. Enjoy, xo!

Healthy Flourless Monster Cookies

healthy monster cookies on a plate

Prep Time 10 minutes

Cook Time 10 minutes

Total Time 20 minutes

Serves20 cookies

Incredible healthy monster cookies packed with peanut butter flavor, chocolate chips, coconut, chocolate candy pieces and nuts. These flourless monster cookies are a wholesome take on a childhood classic you know and love! Easy to make and great for customizing.


  • Wet ingredients:
  • 1 cup natural creamy or chunky peanut butter (only peanuts + salt)
  • 2 tablespoon melted butter or ghee (melted coconut oil will also work)
  • cup packed brown sugar or coconut sugar (can also reduce to 1/2 cup with good results!)
  • 2 eggs
  • 1 teaspoon vanilla extract
  • Dry ingredients:
  • 1 cup gluten free old fashioned rolled oats
  • ½ teaspoon baking soda
  • Optional: ½ teaspoon cinnamon
  • For the mix ins:
  • ¼ cup M&M’s, plus ¼ cup more for topping cookies
  • ¼ cup dark chocolate chips
  • ¼ cup chopped pecans or walnuts
  • ¼ cup unsweetened shredded coconut (not the big flakes)


  • Preheat oven to 350 degrees F. Line a large baking sheet with parchment paper.

  • In a large bowl mix together the wet ingredients until smooth: peanut butter, melted butter/ghee, brown sugar, eggs and vanilla extract. 

  • Next stir in the oats, baking soda and cinnamon. Finally add in all of your mix-ins: M&Ms, dark chocolate chips, nuts and shredded coconut.

  • Use a large cookie scoop to scoop rounded balls of dough onto prepared baking sheet, leaving 2 inches of space between them to spread. Add a few M&Ms on top of each dough ball. If you like fat cookies, do not flatten the dough. If you like thinner cookies, use your hands to gently flatten the tops of the dough before baking.

  • Bake for 10-13 minutes until edges are barely golden brown. Allow cookies to sit on cookie sheet for 5-10 minutes before transferring to a wire rack to finish cooling. This is an important step. Enjoy!

Recipe Notes

To make vegan: I suggest using a flax egg; they just might be a little more fragile so let them rest on the baking sheet a bit longer before removing them. You’ll also need to use dairy free/vegan chocolate chips and vegan chocolate candies instead of M&M’s.
To make nut free: Try subbing in sunflower seed butter or pumpkin seed butter. Sometimes sunflower seed butter causes baked goods to turn green FYI; they’ll still be good to eat though.


Serving: 1cookieCalories: 191calCarbohydrates: 20.2gProtein: 4.5gFat: 11.6gSaturated Fat: 3.6gFiber: 1.8gSugar: 12.3g

This post was originally published on February 5th, 2018, republished on October 20th, 2020, and republished on October 8th 2023.

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