Monster Cookie Bars

Monster Cooke Bars RecipeWhoever decided to take their cookie dough, press it in a pan, bake it, and call it a cookie bar was smart. Now when you want a cookie, but you don’t want to deal with shaping them, doing multiple batches, etc., you can just stick the dough in a pan, bake it, and 10-15 minutes later have your cookie craving satisfied!

Monster Cookie Bars RecipeWhen it comes to making monster cookies, it’s not that I don’t have the patience to wait for shaping, baking, etc., it’s that the longer the dough sits in front of me, the more I eat (what is it about peanut butter and oats that is so good?)! Though I suppose that’s not always a bad thing. . . You have probably noticed that monster cookies are a favorite around here. We have monster cookies, monster cookie pie, monster cookie granola bars, etc. It’s about time that I shared this easy recipe for monster cookie bars!

Monster Cookie Bars RecipeThese cookie bars contain my favorite cookie combination of oats, peanut butter, and chocolate. (And just because peanut butter is so good, I’ve added in some peanut butter chips!) Feel free to use your favorite kind of chocolate chips. I used a mixture of milk chocolate and semi-sweet to get a couple of different flavors of chocolate into these bars. I also used mini M&M’s, because they make it seem like there are lots of M&M’s in your cookie bars without going overboard! Next time you want cookies, but don’t have the time, give these cookie bars a try!

5.0 from 4 reviews
Monster Cookie Bars
Prep time
Cook time
Total time
Serves: 16
  • ¼ C butter, softened
  • ¾ C no-stir natural peanut butter
  • ½ C brown sugar
  • ¼ C sugar
  • 1 egg
  • 1 tsp vanilla extract
  • ¾ C all-purpose flour
  • ½ tsp salt
  • ½ tsp baking soda
  • ½ C quick oats
  • ½ C mini M&M's
  • ½ C chocolate chips (I used a mixture of milk and semi-sweet)
  • ¼ C peanut butter chips
  1. Preheat oven to 350. Lightly spray a 9x9 inch baking dish with non-stick cooking spray.
  2. In the bowl of a stand mixture, beat together butter and peanut butter until smooth. Add in sugars and beat until well-combined. Add in egg and vanilla extract and beat until smooth.
  3. In a small bowl, whisk together flour, salt, and baking soda. Slowly add flour mixture to wet ingredients and beat until combined. Stir in oats.
  4. Add in M&M's, chocolate chips, and peanut butter chips. Stir until just combined.
  5. Press dough into the bottom of prepared baking dish.
  6. Baked for 12-15 minutes or until edges start to turn golden brown and center is set.
  7. Allow to cool for 15-20 minutes and then cut into bars.

This recipe is adapted from The Baker Mama and is linked with Thursday’s Treasures, Weekend PotluckWhat’s Cookin’ Wednesday, What’s in Your Kitchen Wednesday.

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  1. I can’t believe I still haven’t got round to making monster cookies! Pinning this – your bars look gorgeous!

  2. I love cookie bars! My kids would love these.

  3. I love the brightness of this. Looks delicious and fun.

  4. i’m definitely a huge fan of cookie bars for just the reason you mentioned. cookies are great, but i don’t always have the patience :)

  5. Super mega loving that you turned monster cookies (hello, best cookie ever!) into my favorite dessert ever: a bar! Love that it’s so easy. And now I’m craving monster cookies for breakfast!

  6. Love monster cookies! I liked that you added two different kinds of chocolate chips too. I usually do that because I love milk chocolate but I also like adding semi-sweet so the cookies aren’t overly sweet.

  7. I love cookie bars :) Whenever I’m feeling super lazy, I always just throw the cookie dough into a pan. Delicious and easy!

  8. monster cookies are my favorite kind of cookie!! Well, one of them at least. These are a must make. Bar cookies are such less hassle – i love making them! My next recipe is a bar cookie by the way! too funny. :)

  9. Best cookie ever and since they are in bar form you can keep cutting off tiny slivers. All. Day. Long. 😉

  10. TELL me about it! I make so many cookie bars for this reason! I hate making individual cookies now haha. And Um… will you bring a batch of these to FBF so we can share them?!? Thanks 😉 Cant wait to see you there!!! Xoxo

  11. YUM YUM YUM. Bars are everything I love about cookies in super-speedy form :) M+M’s are my favourite.

  12. I wish I had a pan of these in front of me right now! Bars are definitely better than cookies :)

  13. I LOVE Monster bars! They are so much easier than cookies when I need a fast treat :)

  14. I’m so with you – sometimes you just don’t feel like waiting for batch after batch of cookies to bake. Bars are the perfect solution and these combine all of my favorite flavors!

  15. I don’t make monster cookies nearly enough! I’m loving the bar version!

  16. Cookie bars totally do make cookies super easy! I love monster cookies too so-YUM!

  17. These look delicious! I have made Everything Cookies, they are just like the monster cookies! I will be adding these to my do bake list!

  18. These look great Jessica, I love cookie bars and monster cookie bars are even better :-)

  19. Cookie bars are the besttttt – the lazy man’s cookie (coming from the laziest of bakers lol yours truly) simple yet delicious. AND I love how you can add whatever kind of chocolate chips you want to the recipe! 😀

  20. I love a good cookie bar! These look fabulous!

  21. Yum! I need to make these stat!

  22. I love monster cookies but never thought about making them as bars. Great idea!

  23. Oh. Yum…

  24. Oh, I totally agree! Bar cookies rock. These ROCK – yum!

  25. Raw dough is the best! These thick, chewy bars look delicious.

  26. Jessica, these bars are wonderful. I love how they combine healthy ingredients {peanut butter & oats} in a decadent, sweet treat!

  27. did you know i’ve been wanting to make monster cookies…as i have some m&m that need to get used up before i just eat them plain…lol…and well your bars are even more fitting since i am feeling lazy and bars are simpler than cookies…so perfect timing!!! :-)

  28. These look so yummy! I hear ya on eating all of the cookie dough… I feel like sometimes I eat half the dough before it even makes it in the oven, so cookie bars to the rescue!

  29. Ooh, these are so fun! Great baking project for my girls on a snowy day like today :)

  30. These are seriously SO GORGEOUS Jessica!!!

  31. I have to say, I almost like cookie bars MORE than actual cookies. And these look just wonderful – WANT!

  32. Oh my goodness – you’ve combined all of my favorite things into one amazing bar. Well done!

  33. Love love love these! Could be very addicting.

  34. You can nver go wrong with a loaded cookie bar!

  35. I love monster cookies, and I love that you made them so much easier and fast to enjoy!!! Love bar cookies!!!

  36. Love bar cookies – so much better than dealing with the shaping and multiple pans! What a great flavor too, normally I just do traditional chocolate chip.

  37. These cookie bars are so fun!! My kids would go crazy for them. :)

  38. So cute and they look delicious!!

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