Chewy Peanut Butter Cup Blondies

Golden and buttery peanut butter cup blondies make the best anytime treat! Filled with mini peanut butter cups, these easy one-bowl blondie bars are baked in an 8-inch pan and come together in 40 minutes from start to finish (no mixer or chilling required!).

Peanut Butter Cup Blondies

Made with melted butter and brown sugar, soft and chewy blondies are one of my favorite homemade dessert bars.

From easy chocolate toffee blondies to white chocolate snickerdoodle blondies, there’s a blondie for every craving. Blondies with peanut butter are a natural next step in my blondie recipe collection.

Chopped mini peanut butter cups are baked into the buttery, peanut butter-blondie batter; another handful are scattered over the top before baking. Rich and buttery with perfect chewy texture, these blondies are a must bake for peanut butter lovers!

Peanut Butter Cup Blondies

Key Ingredients

Here’s what you need to make peanut butter blondies:

  • Butter – We’re adding plenty of salt to balance out the flavor of the blondies, so unsalted butter is best.
  • Peanut butter – I use and recommend a creamy peanut butter like Skippy or Jif. Natural peanut butters tend to dry out baked goods and could cause your blondies to crumble or have a dry, sandy texture.
  • Brown sugar – You can use light or dark brown sugar in this recipe. Dark brown sugar will add a bit more molasses flavor to the bars.
  • Eggs – One large egg plus one whole egg yolk binds the blondie batter together. The extra egg yolk adds richness and gives the blondies the best chewy texture.
  • Vanilla – Pure vanilla extract complements the peanut butter flavor.
  • Salt – Enhances the flavor.
  • Flour – Use all-purpose flour in this recipe.
  • Mini peanut butter cups – I like Reese’s brand. You can also find mini peanut butter cups at Trader Joe’s.
Peanut Butter Cup Blondies

How to Make Peanut Butter Blondies

Combine butter and peanut butter in a large bowl and microwave in 20 second bursts until butter is melted (about 1 minute total). If you don’t have a microwave, melt butter and peanut butter together in a small saucepan over medium-low heat.

Whisk melted butter and peanut butter to combine. Add brown sugar, egg, egg yolk, vanilla, and salt to the mixing bowl.

Whisk the mixture together until completely smooth and incorporated.

Add all-purpose flour to the bowl and gently stir in with a spatula just until incorporated and no flour streaks remain.

Fold in mini peanut butter cups.

Scrape blondie batter into prepared 8-inch square baking pan. Top with remaining peanut butter cup halves, pressing gently into the batter.

Bake blondies for 25 to 27 minutes, until golden and set in the middle, and a toothpick inserted in the center comes out clean or with a few crumbs attached (don’t over-bake to avoid a dry blondie).

Baked peanut butter blondies in parchment-lined square pan

Cool blondies completely before cutting into squares. For added indulgence, serve blondies with a scoop of vanilla ice cream and enjoy!

Peanut Butter Cup Blondies

More easy brownies and blondies:

Did you try these Peanut Butter Cup Blondies? Let me know by leaving a comment and rating below!

Print
clock clock iconcutlery cutlery iconflag flag iconfolder folder iconinstagram instagram iconpinterest pinterest iconfacebook facebook iconprint print iconsquares squares iconheart heart iconheart solid heart solid icon
Peanut Butter Cup Blondies

Chewy Peanut Butter Cup Blondies

  • Author: Laura Kasavan
  • Prep Time: 15 minutes
  • Cook Time: 25 minutes
  • Total Time: 40 minutes
  • Yield: 12 to 16 blondies
  • Category: Dessert
  • Method: Bake
  • Cuisine: American
Save Recipe

Description

Golden and buttery peanut butter cup blondies make the best anytime treat! Filled with mini peanut butter cups, these easy one-bowl blondie bars are baked in an 8-inch pan and come together in 40 minutes from start to finish (no mixer or chilling required!).


Ingredients

Blondies

  • 1/2 cup (112 g) unsalted butter
  • 1/2 cup (128 g) creamy peanut butter
  • 1 cup (200 g) light brown sugar
  • 1 large egg (50 g), at room temperature
  • 1 large egg yolk (17 g), at room temperature
  • 1 tsp (4 g) vanilla extract
  • 1/8 tsp salt
  • 1 1/4 cups (175 g) all-purpose flour
  • 1 cup (150 g) mini peanut butter cups, halved

Topping

  • 1/2 cup (75 g) mini peanut butter cups, halved

Instructions

  1. Preheat oven to 350°F and line an 8-inch square baking pan with parchment paper.
  2. Melt butter and peanut butter: Combine butter and peanut butter in a large bowl and microwave in 20 second bursts until butter is melted (about 1 minute total). Whisk melted butter and peanut butter to combine. (If you don’t have a microwave, melt together in a small saucepan over medium-low heat).
  3. Make blondies: Add brown sugar, egg, egg yolk, vanilla, and salt to mixing bowl and whisk until smooth. Fold in flour just until incorporated, then fold in mini peanut butter cups. Scrape batter into prepared pan and use a piece of parchment paper coated with nonstick spray to press batter evenly into pan. Top with remaining peanut butter cup halves, pressing gently into the batter; tap pan sharply to remove air bubbles.
  4. Bake blondies for 25 to 27 minutes, until golden and set in the middle, and a toothpick inserted in the center comes out clean or with a few crumbs attached. Cool completely in pan on a wire rack.
  5. Carefully lift parchment to remove bars from pan and place on a cutting board; cut into squares with a sharp knife.
  6. Store leftover blondies in an airtight container at room temperature for 2 to 3 days.


Notes

Brown sugar: You can make these blondies with light or dark brown sugar.

Mini peanut butter cups: I use Reese’s Peanut Butter Cups. You can also find mini peanut butter cups at Trader Joe’s or use Reese’s Pieces candy. You can also fold in peanut butter chips or chocolate chips.

Freeze blondies: To freeze blondies, cool completely before wrapping with plastic wrap and placing in a freezer bag. Freeze up to 3 months. Thaw blondies at room temperature (still wrapped to prevent condensation from forming) before serving.

The equipment section above contains affiliate links to products I use and love!

Keywords: Peanut Butter Blondies, Peanut Butter Blondie Recipe

This post may contain affiliate links. Please see my disclosure policy.

Leave a Comment & Rate this Recipe

If you love this recipe, please consider leaving a comment and review to help other readers. If you have a question, I'd love to hear from you too.

As always, thanks for your feedback!

Recipe rating 5 Stars 4 Stars 3 Stars 2 Stars 1 Star

This site uses Akismet to reduce spam. Learn how your comment data is processed.

29 Comments

  1. Peanut butter cups are my favorites, too. I’ll admit that I’ve had more than my share from the candy stash at work this Halloween season. Wish I had some now to try these blondies!

  2. Blondies with PB cups! I rather want these blondies than just PB cups! I wish I can get these if I go trick or treating at your house. 😉

  3. You make the most delectable sweets. I could make that if I reduced the sugar and used gluten-free flour. Thanks for the inspiration.

  4. Oh, my! Such moist and chewy, buttery-brown sugary-peanut butter goodness! I just adore Blondies…and Reese’s! Anything peanut butter and chocolate, I am obsessed with. Thanks for sharing this rendition of Blondies, Laura! Pinning!