Irresistible Monster Cookie Bars: Easy & Delicious!

Are you looking for delicious and easy Monster Cookie Bars recipes? I’m offering you 16 simple recipes for irresistibly tasty Monster Cookie Bars that you can make at home.

There’s nothing quite like the smell of freshly baked Monster Cookie Bars filling the kitchen. I remember making a batch for a family gathering, and they disappeared in minutes! The combination of chewy oats, creamy peanut butter, and chunks of chocolate makes these bars a guaranteed crowd-pleaser.

These easy-to-make treats come together quickly and require only one bowl. I love how versatile they are, perfect for parties, picnics, or afternoon snacks. Once you try them, you’ll see why they’ve become a favorite for so many dessert lovers.

I’ve perfected the recipe to be simple, delicious, and foolproof. Whether you’re a seasoned baker or just starting out, you’ll find these Monster Cookie Bars surprisingly effortless and irresistibly tasty.

1. Monster Cookie Bars

These Monster Cookie Bars are a delicious blend of chewy peanut butter oatmeal cookies loaded with chocolate chips and colorful M&M’s, all baked into one easy pan. They’re soft, fun, and perfect for sharing at parties, potlucks, or anytime you crave a sweet, crowd-pleasing treat!

Read the Recipe: Monster Cookie Bars

2. Monster Cookie Bars [scientificallysweet.com]

These Monster Cookie Bars are a delicious, chewy treat that’s super easy to make in just one bowl—no mixer needed! They’re packed with peanut butter, oats, chocolate chips, and candy-coated pieces, giving you a perfect sweet and salty flavor with a rich, chewy texture.

Read the Recipe: Monster Cookie Bars [scientificallysweet.com]

3. Monster Cookie Bars [www.designeatrepeat.com]

These monster cookie bars are soft, chewy, and packed with flavor, thanks to a delicious mix of peanut butter, oats, chocolate chips, and colorful M&M’s! Simply combine all the wet and dry ingredients, press the sticky dough into a 9×13″ pan, and bake — it’s an easy crowd-pleaser that comes together in no time.

Read the Recipe: Monster Cookie Bars [www.designeatrepeat.com]

4. Monster Cookie Bars [chocolatewithgrace.com]

Monster Cookie Bars pack all the peanut buttery, chocolatey, chewy goodness of traditional cookies into a quick and simple bar that’s perfect for any snack time. Just mix together butter, sugar, peanut butter, eggs, vanilla, oats, flour, and chocolate chips, then press the dough into a pan and bake—making them an easy, delicious treat in about an hour!

Read the Recipe: Monster Cookie Bars [chocolatewithgrace.com]

5. Monster Cookie Bars [www.fivehearthome.com]

These Monster Cookie Bars are a delicious and fun treat loaded with oats, peanut butter, and colorful M&Ms that make every bite chewy and irresistible. Just one bowl and a sheet pan are all you need to whip up a big batch, perfect for parties or when you need a quick, crowd-pleasing dessert!

Read the Recipe: Monster Cookie Bars [www.fivehearthome.com]

6. Monster Cookie Bars [suebeehomemaker.com]

These Monster Cookie Bars are a delightful treat packed with old-fashioned oats, peanut butter, mini M&Ms, and chocolate chips, creating a perfect chewy and tender bite. Best of all, they’re super easy to make with no chill time needed—just gather your ingredients, mix everything together, and bake in a single pan for quick, crowd-pleasing goodness!

Read the Recipe: Monster Cookie Bars [suebeehomemaker.com]

7. Monster Oatmeal Chocolate Chip Cookie Bars.

These Monster Oatmeal Chocolate Chip Cookie Bars are super easy to make using just one bowl, blending oatmeal cookie dough with chocolate chips and Reese’s Pieces or any leftover Halloween candy for a festive touch. They’re chewy, flavorful, and perfect for snacking or sharing, especially during Halloween or Thanksgiving, making everyone LOVE them!

Read the Recipe: Monster Oatmeal Chocolate Chip Cookie Bars.

8. Monster Cookie Bars [handletheheat.com]

Monster Cookie Bars are gooey, chewy, and ultra-thick, bursting with peanut butter flavor, and loaded with chocolate chips and M&Ms. In just under 45 minutes, you can whip up this easy and delicious treat that’s perfect for satisfying any sweet tooth!

Read the Recipe: Monster Cookie Bars [handletheheat.com]

9. Monster Cookie Bars [www.afarmgirlsdabbles.com]

These Monster Cookie Bars are thick, chewy, and loaded with chocolate chips and M&Ms, making them a fun and easy treat to enjoy anytime. Just mix everything in one bowl, spread the dough in a pan, bake, and enjoy wholesome, delicious bars that are perfect for parties, picnics, or any festive occasion!

Read the Recipe: Monster Cookie Bars [www.afarmgirlsdabbles.com]

10. Monster Cookie Bars [twosugarbugs.com]

These monster cookie bars are a heavenly treat that come together in just one bowl, making them perfect for a quick and satisfying dessert. They’re soft, chewy, and packed with peanut butter, oats, chocolate chips, and M&M’s, with a delicious layer of extra peanut butter baked inside for that gooey, addictive bite!

Read the Recipe: Monster Cookie Bars [twosugarbugs.com]

11. Monster Cookie Bars [cambreabakes.com]

These Monster Cookie Bars are irresistibly chewy peanut butter oatmeal treats loaded with colorful M&M candies and gooey chocolate chips. Made in just one bowl and baked in under an hour, they’re perfect for any occasion and can be easily customized with your favorite mix-ins!

Read the Recipe: Monster Cookie Bars [cambreabakes.com]

12. Monster Cookie Bars [www.bostongirlbakes.com]

These Monster Cookie Bars are a quick and delicious treat made with peanut butter, oats, M&M candies, and chocolate chips that bake up into irresistibly chewy, golden bars. Just mix everything together, pop them in the oven, and enjoy a candy store explosion in every bite that’s perfect for satisfying any sweet tooth!

Read the Recipe: Monster Cookie Bars [www.bostongirlbakes.com]

13. No Flour Monster Cookie Bars

These No Flour Monster Cookie Bars are a delightful treat packed with peanut butter, oats, chocolate chips, and M&M’s, baked in a single cookie sheet to serve a crowd. They are slightly underdone when fresh out of the oven, which helps them firm up perfectly as they cool, making every bite irresistibly gooey and satisfying!

Read the Recipe: No Flour Monster Cookie Bars

14. Monster Cookie Bars [www.allrecipes.com]

These monster cookie bars are a delightful mix of savory and sweet flavors, loaded with peanut butter, oats, milk chocolate chips, and candy-coated chocolates. Just mix, spread in a pan, bake for about 25 minutes, and enjoy a rich, chewy treat that’s perfect for sharing!

Read the Recipe: Monster Cookie Bars [www.allrecipes.com]

15. Monster Cookie Bars [butternutbakeryblog.com]

These Monster Cookie Bars are a quick and easy treat that mix together by hand in just one bowl, resulting in super chewy, rich, and gooey bars filled with extra peanut butter, chocolate, and candies. Just press the dough into a baking dish, top with more chocolate goodies, bake for 30 minutes, and enjoy these delightfully indulgent bars that everyone will love!

Read the Recipe: Monster Cookie Bars [butternutbakeryblog.com]

16. Peanut Butter and Chocolate Monster Cookie Bars

These Peanut Butter and Chocolate Monster Cookie Bars are quick to make and packed with delicious oats, peanut butter, and chocolate chips. Just mix everything together, bake for about 15 minutes, and enjoy a chewy, gooey treat that your family will love!

Read the Recipe: Peanut Butter and Chocolate Monster Cookie Bars