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Healthy Monster Cookie Bars

Print Recipe
Prep Time 15 mins
Cook Time 15 mins
Total Time 1 hr
Yield 9 bars
Category Dessert
Cuisine American
Author Lauren Grant


With nice crunchy edges and uber-chewy interior, these healthy monster cookie bars are pure bliss.


  • cup (75 grams) white whole-wheat flour
  • cup (57 grams) old fashioned rolled oats
  • ¾ teaspoon kosher salt
  • ¼ teaspoon baking powder
  • ¼ teaspoon cinnamon, optional
  • 5 tablespoons (70 grams) unsalted butter
  • 1 cup (147 grams) coconut sugar
  • 5 tablespoons (83 grams) natural creamy peanut butter* (¼ cup + 1 tablespoon)
  • 1 ¾ teaspoons pure vanilla extract
  • 2 large egg yolks (30 grams)
  • ¼ cup dark chocolate chips
  • ¼ cup candy coated chocolate candies such as m&m’s
  • Flaky sea salt, optional


  • Heat oven to 350ºF (176ºC) with rack set in middle position.
  • Grease an 8×8-inch metal baking pan with nonstick spray; line pan with 1 piece of parchment paper to form a sling.
  • In a medium bowl, whisk together flour, oats, salt, baking powder and cinnamon.
    oats and flour in a glass bowl
  • Cut butter into tablespoons and add to a large bowl. Microwave butter in 30 second increments until melted. 
  • Add coconut sugar, peanut butter and vanilla to warm melted butter and whisk until smooth; about 30 seconds. Let rest 1 minute, then whisk another 30 seconds. Rest 1 minute then add egg yolks.
    cookie dough in a bowl with egg yolk added
  • Whisk until a smooth caramel-like batter is formed. Scrape whisk clean.
    caramel-like coconut sugar, peanut butter and butter mixture
  • Add flour mixture to peanut butter mixture and, using a rubber spatula, mix until a dough comes together.
    cookie dough made with oats in a glass bowl
  • Roughly chop chocolate chips and chocolate candies; reserve 2 tablespoons for sprinkling over top.
  • Add remaining chocolate chips and chocolate candies to dough and mix to combine.
  • Press dough into prepared pan in an even layer using hands.
  • Sprinkle reserved chocolate and candies over top.
    cookie dough made with oats, chocolate chips and chocolate candies in a metal baking pan
  • Bake cookie bar until edges are lightly browned and center is puffed but set, 17–20 minutes. (Don’t over-bake!) 
  • Transfer pan to a wire rack and sprinkle bar with flaky sea salt, if using.
    cookie bars made with chocolate chips, oats and m&ms in a metal baking pan
  • Let bar cool in pan 10 minutes. Lift bar out of pan using parchment overhang and transfer to wire rack to cool completely. 
  • Using a large sharp knife, cut bar into 9 squares.


Peanut butter: it’s important to use natural peanut butter, the kind that’s only made with peanuts and salt. Check out the article above the recipe for a list of my favorite brands. I use salted peanut butter, but unsalted will also work.
5 tablespoons = 1/4 cup + 1 tablespoon
I get the best results when I use the melted butter right away. Don't let it cool down and re-solidify. 


Serving: 1 barCalories: 203kcalCarbohydrates: 25gProtein: 4gFat: 10gSaturated Fat: 5gCholesterol: 37mgSodium: 145mgFiber: 2gSugar: 16g
Keywords monster cookie bar recipe, monster cookie bars
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