My monster cookie bars are a family-favorite recipe. These bars are packed with chocolate, peanut butter, oats, and more! They have a wonderfully chewy texture that I can’t get enough of, and they make a great after-school snack.
These monster cookie bars are my take on the classic monster cookies that everyone loves. Instead of a cookie, you get a thick and chewy bar of monster goodness. They are packed with fiber and protein from the oats and the peanut butter, making them a good option for energy too. They’re one of my favorite sweet snacks!
What’s in This Monster Cookie Bars Recipe?
- Peanut Butter: Creamy peanut butter adds delicious peanut flavor to the bars. You can use chunky peanut butter to give these cookies even more crunchy texture to bite into.
- Eggs: Bind the bars and keep them moist.
- Sugar: A combination of coconut and granulated sugars adds sweetness to the cookie bars. If you don’t have coconut sugar, you can use an equal amount of brown sugar in its place.
- Vanilla Extract: Enhances the sweetness of the bars.
- Oats: Add chewy texture. I like thick-cut old-fashioned rolled oats for extra texture, but regular oats will work as well.
- Baking Soda: Helps the bars rise in the oven.
- Salt: A touch of kosher salt enhances the flavor of the bars.
- Chocolate Chips: Semisweet chocolate chips add pops of chocolatey flavor.
- M&M’s Candies: Add crunch and sweetness to the bars.
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How to Store and Reheat
Store leftover monster cookie bars in an airtight container at room temperature for up to 3 days, in the refrigerator for up to 1 week, or in the freezer for up to 3 months. Let thaw overnight in the refrigerator before enjoying at room temperature or gently heated in the microwave.
Tips for Success
- I like to sprinkle more of the chocolate chips and chocolate candies on top of the dough after I’ve spread it out on the baking dish.
- You can prepare the dough in advance and then put it into an airtight storage container in the freezer until you’re ready to bake these delicious cookies for everyone to enjoy.
- Allow the bars to cool fully before cutting into them.
Monster Cookie Bars Recipe
Ingredients
- 1 cup creamy peanut butter
- 2 large eggs
- ¼ cup coconut sugar
- ¼ cup granulated sugar
- 2 teaspoons pure vanilla extract
- 1½ cups thick-cut old-fashioned rolled oats
- ½ teaspoon baking soda
- ½ teaspoon kosher salt
- ½ cup semisweet chocolate chips
- ½ cup M&M's candies
Equipment
- Kitchen Scale (optional)
- 8×8 Baking Pan
- Hand Mixer
Instructions
- Preheat oven to 350°F. Line an 8×8-inch baking pan with parchment paper and set aside.
- In a medium bowl, using a hand mixer, beat the peanut butter and eggs together until well-combined.1 cup creamy peanut butter, 2 large eggs
- Mix in the coconut sugar and granulated sugar. Add the vanilla and mix to combine. The dough will be thick and sticky.¼ cup coconut sugar, ¼ cup granulated sugar, 2 teaspoons pure vanilla extract
- Stir in the oats, baking soda, and salt.1½ cups thick-cut old-fashioned rolled oats, ½ teaspoon baking soda, ½ teaspoon kosher salt
- Fold in the chocolate chips and M&M's candies, saving a few to sprinkle on top if desired.½ cup semisweet chocolate chips, ½ cup M&M's candies
- Spread the mixture evenly into the prepared baking pan and bake for 20-25 minutes, or until just beginning to brown around the edges.
- Allow the bars to cool to room temperature before cutting into squares.
Notes
How to Make Monster Cookie Bars Step-by-Step
Beat the Peanut Butter: Preheat your oven to 350°F, line an 8×8-inch baking pan with parchment paper, and set aside. In a medium bowl, using a hand mixer, beat 1 cup of creamy peanut butter and 2 large eggs together until well combined.
Add the Sugar: Mix in ¼ cup of coconut sugar and ¼ cup of granulated sugar. Add 2 teaspoons of vanilla extract and mix to combine. The dough will be thick and sticky.
Add the Oats: Stir in 1½ cups of thick-cut old-fashioned rolled oats, ½ teaspoon of baking soda, and ½ teaspoon of kosher salt.
Fold in the Candies: Fold in ½ cup of semisweet chocolate chips and ½ cup of M&M’s candies, saving a few to sprinkle on top if desired.
Bake the Bars: Spread the mixture evenly into the prepared baking pan and bake for 20-25 minutes, or until just beginning to brown around the edges.
Cool the Bars: Allow the bars to cool to room temperature before cutting into squares.
Looks delicious! Do you use two eggs as the recipe states or three as show in the pictures?
2 eggs! Sorry for the confusion!