★★★★★

Peanut Butter Brookies

Peanut Butter Brookies are the marriage of fudgy brownies and chewy peanut butter cookies! This recipe features even more decadence with the addition of Reese’s peanut butter cups. This easy to make dessert blows everyone away!

Have you learned how to make Brookies yet? It’s no more difficult than making a pan of brownies or cookie bars, but the results are doubly impressive!

Peanut butter brookie on a white plate to serve.

Why this Recipe Works

I don’t know a lot of things, but here’s one: people love the combo of chocolate and peanut butter!

People also love brookies–the result of adding a layer of cookie dough to a pan of brownie batter before baking.

Today’s recipe combines ALL of those favorites into one delicious and easy dessert bar.

  • Can’t decide between a pan of brownies or a batch of peanut butter cookies? Peanut Butter Brookies are the answer!
  • Both layers of this treat are moist, fudgy and chewy.
  • We added peanut butter morsels AND peanut butter cups to put these over the top!

If you love today’s recipe, be sure to try our chocolate peanut butter cookies next. So fudgy and good.

Ingredient Notes

Ingredients needed to make peanut butter brookies.

Making today’s recipe is simple enough with ingredients you may already have in your pantry. Be sure to scroll down all the way to the recipe card for a complete list with exact measurements.

  • Crisco. Using shortening in the cookie layer is vital for the ideal texture. We used butter flavor but plain shortening works well too.
  • Unsalted butter. Using unsalted butter allows you to control the saltiness of the finished peanut butter brookies. You’ll need melted butter for the brownie layer and softened butter for the cookies.
  • Creamy peanut butter. We prefer the consistency of regular shelf stable peanut butter like (Jif or Skippy) when baked into cookies. Natural styles of peanut butter have oils that separate as the cookie layer bakes, which would make it crumbly or greasy.
  • Vanilla. For best flavor, use pure vanilla extract. Our homemade vanilla gives these brookies an incredible depth of flavor.
  • Reese’s peanut butter cups. For this recipe, you will need mini peanut butter cups unwrapped. You can also use full sized peanut butter cups cut up into 1 inch pieces. Use our homemade peanut butter cups for a delicious twist.

Easy Instructions

Step by step photos showing how to make the layers in brookies.

For the brownie layer:

Melt chocolate chips with butter and stir until smooth. Mix in sugar, flour and eggs until combined. Pour the brownie batter into a baking dish lined with parchment paper.

For the cookie dough:

Beat the shortening and butter together. Then, mix in the remaining ingredients. Fold in the peanut butter morsels and Reese’s cups.

Assemble and bake:

Smooth the cookie dough over the brownie batter layer and bake.

Let the Peanut Butter Brookies cool completely at room temperature. Then, transfer to the fridge to chill before cutting into bars.

Peanut butter brookies cut into squares and stacked.

Tips and Tricks

  • It’s okay if the cookie layer still looks a bit soft when you take it out of the oven. It will continue firming up as the brookies cool down.
  • These Peanut Butter Brookies taste amazing served cold straight from the fridge. You can also let them come to room temperature if you prefer. They’re delicious either way!
  • Use a clean plastic knife to slice the brookie bars for a perfectly smooth cut.

Recipe FAQs

I only have salted butter. Can I still make this peanut butter brookies recipe?

Yes–don’t let your lack of unsalted butter stop you! If using salted butter, you may want to reduce or omit the added salt in the cookie layer.

Do I have to keep these brookies in the fridge?

Once they’ve firmed up and chilled, you can store them at room temperature if you prefer. Make sure to keep them in an airtight container either way!

Can I make this recipe with all butter instead of shortening?

Using butter instead of shortening will affect the appearance and consistency of the baked brookies. Shortening helps them brown and maintain a chewy texture, so I highly recommend making the recipe as directed.

Will this recipe work with natural peanut butter?

I haven’t tested peanut butter brookies with natural peanut butter. However, I have found natural peanut butter tends to make peanut butter cookies greasy and crumbly, so I wouldn’t recommend using it in this recipe.

Peanut butter brookie bars cut into large squares.

More Chocolate Peanut Butter Desserts

Yield: 24 bars

Peanut Butter Brookies

Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes

A chocolate brownie layer topped with peanut butter cookie and Reese's peanut butter cups! That's how you make Peanut Butter Brookies!

Ingredients

For the Brownie layer:

  • 2 cups semi-sweet chocolate morsels
  • ½ cup unsalted butter, melted
  • 1 cup granulated sugar
  • ¾ cup all-purpose flour
  • 3 large eggs

For the Cookie layer:

  • ½ cup butter flavored Crisco
  • 2 Tablespoons unsalted butter, softened
  • 2 Tablespoons milk
  • 1 Tablespoon vanilla extract
  • ¼ cup granulated sugar
  • 1 cup light brown sugar, packed
  • ¾ cup creamy peanut butter
  • 1 large egg
  • 1 ¾ cup all-purpose flour
  • 1 teaspoon kosher salt
  • 2 teaspoom baking powder
  • 1 cup peanut butter morsels
  • 8 ounce bag Reese's mini peanut butter cups, cut in half

Instructions

  1. For the brownie layer, melt chocolate chips with butter for 1 ½ minutes in microwave safe glass bowl. Stir until smooth. Add sugar, flour and eggs and combine completely.
  2. Pour into a 13x9 baking dish lined with parchment paper.
  3. For the cookie dough, beat crisco with butter. Beat in milk, vanilla, sugars, peanut butter and egg. Add flour, salt, and baking powder. Fold in peanut butter morsels and Reese's mini PB cups.
  4. Drop cookie dough onto brownie batter layer. Smooth evenly.
  5. Bake in a 375 degree oven for 35-40 minutes. Remove and cool completely. Refrigerate and cut into bars.

Notes

  • It's okay if the cookie layer still looks a bit soft when you take it out of the oven. It will continue firming up as the brookies cool down.
  • These Peanut Butter Brookies taste amazing served cold straight from the fridge. You can also let them come to room temperature if you prefer. They're delicious either way!
  • Use a clean plastic knife to slice the brookie bars for a perfectly smooth cut.
  • Nutrition Information:

    Yield:

    24

    Serving Size:

    1 bar

    Amount Per Serving: Calories: 440Total Fat: 26gSaturated Fat: 11gTrans Fat: 0gUnsaturated Fat: 13gCholesterol: 55mgSodium: 267mgCarbohydrates: 48gFiber: 3gSugar: 32gProtein: 8g

    *Nutrition facts are an estimate and not guaranteed to be accurate. Please see a registered dietitian for special diet advice.

    Did you make this recipe?

    Please leave a comment on the blog or share a photo on Instagram

    Why choose between Peanut Butter Cookies and Peanut Butter Brownies when you can have BOTH? Peanut Butter Brookies with Reese’s Peanut Butter Cups are a homerun every time.

    About Aimee

    Aimee is a dessert lover (specifically rice krispie treats), workout enthusiast, self-taught foodie, and recipe creator.

    Learn more about Aimee.

    Affiliate Disclosure:**There may be affiliate links in this post! By clicking on them, or purchasing recommended items I may receive a small compensation. However, I only recommend products I love! Thank you for supporting Shugary Sweets! See my disclosure policy for more info**

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    Posted on June 21, 2022

    Comments & Reviews

    1. Wow! I will be trying these, but converting to Aussie ingredients! My kids will think they’ve died and gone to heaven, the little peanut butter junkies!

    2. My craving for peanut butter and chocolate is never ending!! What an absolutely drool worthy bar! I could put a serious dent in that pan of goodness!!!

      1. Love that you shared a Reese’s recipe today too 🙂 We could put a dent in the pan together!!

    3. Oh my GOSH… When it comes to treats, there really isn’t a better combo than chocolate and peanut butter. Your brookies look AMAZING and I can’t wait to try them!

    4. These look amazing. I’ve made your brownie base before and they are fantastic…but don’t they have cocoa? Is this base different?

      1. This base is a little different. Instead of cocoa I melted chocolate morsels. You could use either version 🙂

    5. Oh my goodness, this looks AMAZING!!! I love peanut butter anything and I so need this in my life. Pinning! 🙂

    6. Wowie, these attracted me on google. My little boy was beside me when I saw, and he was drooling over these. Looks delicious.

    7. Oh Aimee I want to devour that whole pan right now! Great Brookie and I am pinning you!!!

    8. Peanut butter and chocolate is pretty much heaven. I love that there are peanut butter chips and peanut butter cups. I think I need to eat a hundred of these.

      1. Thanks!! I lthink a lot of people feel the same about chocolate and peanut butter!!

    9. Just saw these on Foodgawker and stopped dead in my tracks. These look SO amazing. I just love layered cookie bars like this…especially when it’s chocolate and peanut butter!

    10. Be still my heart! These are perfection and I need them NOW. That gooey, sliiiiightly underbaked patch in the peanut butter cookies is my siren song. Oh, and the fact that a peanut butter cookie is baked on top of a freakin’ brownie. Genius!

    11. I only get that craving alllll the time!!!

      These look ohhh so good! Rich and chewy and nomnomnom!

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