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Oatmeal Chocolate Chunk Cookie Brownies

Half oatmeal cookie and half decadent peanut butter fudge brownie.  These Oatmeal Chocolate Chunk Cookie Brownies are loaded with delicious flavor. They are so sinfully rich and tasty that they remain my favorite cookie brownie of all time.

Oatmeal Chocolate Chunk Cookie Brownies - A close up of layered peanut butter swirl brownies topped with oatmeal cookie dough and chocolate chunks.

A chocolate chunk brownie layered with a classic oatmeal cookie and layered with more brownie and peanut butter swirls with chocolate chunks.  In case you didn’t know, this is a brookie.  

A cookie + brownie = brookie.  Yes, it’s a real thing and it’s delicious.  I couldn’t decide what I wanted more, a cookie or brownie, so this happened.  It’s one of those gourmet recipes that will cure any craving you’re having.  These Oatmeal Chocolate Chunk Cookie Brownies are that good!

Ghirardelli Chocolate - A bar of Ghiradelli chocolate chopped on a slate board.
Ghirardelli Chocolate

Simple and perfectly chewy, ooey-gooey bars. This recipe is stuffed with chocolate, peanut butter, and warm oatmeal flavors. Just when you get a hint of oatmeal cookie, you bite into peanut butter. Ummm Yum. this makes me hungry just talking about it!  Just in time for the weekend because I think I need to make some more and pack them on my road trip back to Wisconsin.

Oatmeal Chocolate Chunk Brownie Cookie Ingredients

  • CHOCOLATE: A combination of baking chocolate, cocoa powder, and chocolate chips/chunks is used in this recipe.
  • OATMEAL: Old-fashioned oatmeal.
  • PEANUT BUTTER: Creamy, smooth peanut butter gets swirled into the brownie batter.
  • FLOUR: all-purpose flour works perfectly.
  • OIL: Yields a moist oatmeal cookie base.
Oatmeal Chocolate Brookies - An overhead view of the oatmeal cookie chocolate chunk brownie with melted peanut butter, oatmeal chunks, and melted chocolate on top.

How to Make Brookies

  1. Whisk melted chocolate and sugar.
  2. Whisk in eggs and vanilla extract.
  3. Stir in cocoa powder, salt, flour, and chocolate chunks.
  4. Stir in melted peanut butter.
  5. Mix together oatmeal, flour, brown sugar, baking soda, salt, oil, egg, and vanilla.
  6. Fold in chocolate.
  7. Drop dollops of brownie batter in pan.
  8. Sprinkle with oatmeal cookie dough.
  9. Top with remaining brownie batter and cookie dough.
  10. Swirl in melted peanut butter.
  11. Bake in 350°F oven for 25-35 minutes.
  12. Cool 1 hour. Cut and serve.

Honestly, this is the best combination of a cookie and a brownie. They’re pretty amazing, delicious, and are seriously one of my favorite treats.

Oatmeal Chocolate Chip Cookie Brownies - brookie bars stacked on wood. Text in center reads oatmeal cookie chocolate chunk brownies. A collage of images featuring the steps to make the brookies.
Oatmeal Chocolate Chip Cookie Brownies

Oatmeal Chocolate Chunk Cookie Brownies

Half oatmeal cookie and half decadent peanut butter fudge brownie.  These Oatmeal Chocolate Chunk Cookie Brownies are loaded with delicious flavor. They are so sinfully rich and decadent that they remain my favorite cookie brownie of all time.
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Course: Dessert
Cuisine: American
Keyword: brookies, oatmeal brownie bars
Prep Time: 20 minutes
Cook Time: 25 minutes
Total Time: 45 minutes
Servings: 18
Calories: 374kcal

Ingredients

Brownie

  • 10 tbsp unsalted butter
  • 2 oz milk or semi sweet chocolate (chopped)
  • 1 cup granulated sugar
  • tsp vanilla extract
  • 2 large eggs
  • ½ cup cocoa powder
  • ½ cup all-purpose flour
  • ¼ tsp salt
  • cup semi sweet chocolate chips ( or chocolate chunks)
  • ½ cup creamy peanut butter (melted)

Cookie

  • 1⅓ cup old fashioned oats
  • 1 cup all-purpose flour
  • ½ cup brown sugar
  • ½ tsp baking soda
  • ¼ tsp salt
  • ½ cup oil
  • 1 egg
  • 2 tsp vanilla extract
  • 4 oz dark chocolate (chopped into chunks)
  • handful of chocolate chunks

Instructions

  • Preheat the oven to 350°F. Line a 9×13 inch baking dish with foil or parchment paper and grease.
  • To make the brownie batter, combine butter and 2 oz chocolate to a microwave safe bowl.
    Microwave on 30 second intervals, stirring after each interval until melted and smooth; about 1½ minutes.
  • In a medium bowl, combine melted chocolate and sugar, whisk until combined.
  • Whisk in vanilla extract, and eggs.
  • Stir in cocoa powder, flour and salt and mix until just combined,
  • Stir in remaining chocolate chips.
  • Melt peanut butter in microwave.
    Swirl in ¼ cup of the melted peanut butter (save remaining ¼ cup for later), leaving a few streaks of peanut butter; set aside.
  • To make the oatmeal cookie batter add oatmeal, flour, brown sugar, baking soda, salt, oil, egg, and vanilla to bowl of stand mixer. Beat until combined and it holds together.
    TIP: the dough will seem oily, this is good, if not add a tbsp more of oil.
  • Fold in ½ cup chocolate chunks; set aside.
  • To assemble, drop dollops of ½ brownie batter into prepared pan.
  • Sprinkle ¾ of the oatmeal cookie dough around and over the brownie batter and in the corners.
  • Dollop the remaining brownie batter over top the oatmeal cookie dough.
  • Swirl in ¼ cup melted peanut butter into brownie batter dollops.
    Drizzle any remaining over entire pan. Slightly press a handful of chocolate chunks into the top of batter.
  • Bake for 25-35 minutes. Cover with foil the last 10 minutes to ensure the top does not get crispy.
  • Cool in pan for 1 hour before slicing and serving.

Nutrition

Calories:374kcal | Carbohydrates:38g | Protein:6g | Fat:23g | Saturated Fat:9g | Trans Fat:1g | Cholesterol:45mg | Sodium:149mg | Potassium:219mg | Fiber:3g | Sugar:22g | Vitamin A:242IU | Calcium:31mg | Iron:3mg

updated 6/2021

15 Comments

  • Avatar for Swankyrecipes
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    Kimberlee
    06/14/2014 at 4:45 pm

    These look and sound delicious – can’t wait to bake them. Adding to my list of things to bake this month.

  • Avatar for Swankyrecipes
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    Kim @ The Cookie Puzzle
    06/15/2014 at 8:59 am

    These look amazing! I am in Missouri..and the weather here is hot and humid too…I tend to bake a lot at night, or in the early morning. We would love for you to join us at Party in Your PJS.

    http://www.thecookiepuzzle.com/2014/06/party-in-your-pjs-7_12.html

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    Laura@Baking in Pyjamas
    06/15/2014 at 2:03 pm

    Visiting from the Show-Licious Link Party. These looks amazing, I love anything with oats and chocolate in, delicious! I co-host Sweet and Savoury Sunday and would love for you to stop by and share this and other recipes with us. Have a great day!

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    Wendy
    06/15/2014 at 4:13 pm

    Your photos make me want to leap right in and take a bite! The combination of oatmeal cookie and brownie looks and sounds delicious! Pinning to make asap!

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    Marti @ SewliciousHomeDecor
    06/20/2014 at 11:56 pm

    5 stars
    These are my very favorite! I love oatmeal and chocolate together!! Pinned 🙂

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    Judy
    07/08/2014 at 12:04 pm

    Wow, could these look any more delicious? I gained 10 pounds just looking at them. I’m definitely going to make these–maybe today!

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    Michelle @ A Dish of Daily Life
    07/11/2014 at 9:42 pm

    5 stars
    These look so decadent! I want one NOW! I really love oatmeal and chocolate together. Brownies, bar cookies…those are my kind of desserts! Pinning right now!

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    dina
    07/13/2014 at 3:46 pm

    these look so delicious!

  • Avatar for Swankyrecipes
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    Nicole @ Three 31
    07/26/2014 at 3:37 am

    HOLY YUM! Wow, these look good enough to eat …. or lick the computer screen. Thanks for sharing this recipe, I’m definitely going to try these cookies/brownies/bars as soon as possible. As a lactating momma, I’ll add a handful of flax seed as well. With the exception of the “brownie” part, my favorite “milk maker” cookies combine chocolate chip cookies with milk-producing ingredients: whole oats and flax seed. The peanut butter in these bars takes them to a whole ‘nother level of yumminess. THANKS AGAIN FOR SHARING. 🙂

    p.s. I’m sorry someone didn’t properly warn you about the heat and humidity in The South. If you were my neighbor, I’d offer you a glass of sweet tea while we sit a spell and (impatiently) wait for these brookies to bake. HA!

    • Avatar for Swankyrecipes
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      Jessica Knott
      07/26/2014 at 4:06 pm

      I’d love to have you as my neighbor, it sounds like a lot of fun! And the flax seeds, I love the idea and will have to try it next. Thank you for your kind words!

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    Jennifer
    08/10/2014 at 10:19 am

    5 stars
    These look really delicious! I have to try it!

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    Paula Kiger
    09/20/2014 at 5:46 pm

    These look so good!

    • Avatar for Swankyrecipes
      Reply
      Jessica Knott
      09/22/2014 at 11:10 am

      Thanks so much, Paula. These brookies are a favorite in our house!

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