Reese’s Peanut Butter Blondies

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This peanut butter blondies recipe with Reese’s pieces are seriously to die for. These take about 10 minutes to throw together and bake up in less than 30. Throw in some chocolate chips for the best dessert ever.

3 peanut butter blondies stacked on top of each other


 
 

So you know you have a winner of a dessert on your hands when your friends hide it during a party so no one else can have it. Yes this really happened.

I mean peanut butter. Chocolate. Reese’s pieces. Who can blame them?

Here’s the best part about these blondies. Besides their ooey gooey wonderfulness. They are seriously a cinch to make. Like maybe 15 minutes tops putting them together. And about 25 minutes to bake. I made a version before of these with browned butter and M&M’s. So I knew that with a bit of peanut butter and Reese’s Pieces these wouldn’t disappoint at all.

Why You Will Love These Peanut Butter Blondies

  • No Mixer Needed – I love a good dessert that doesn’t involve me getting out my mixer. So much easier!
  • Quick To Mix Up – In about 15 minutes or less these are ready to be popped into the oven.
  • Quick To Bake – Not only are they fast to prepare, they take about 25 minutes to bake as well. That means in under an hour you will have mixed, baked, and cleaned up the kitchen. How awesome is that?

Ingredients Needed

  • Flour
  • Baking Powder
  • Salt
  • Unsalted butter – If you don’t have unsalted butter, you can use salted butter but then reduce the salt.
  • Light brown sugar – Dark brown sugar would also work.
  • Granulated sugar
  • Eggs
  • Vanilla
  • Peanut butter – I use a smooth peanut butter, not the kind you have to stir (this can sometimes be too oily). I think chunky peanut butter would also work great.
  • Reese’s pieces – These are optional but add more fun peanut butter flavor. You could also use chopped peanuts or peanut butter chips.

How To Bake These Blondies

  1. Combine dry ingredients. Whisk flour, baking powder, and salt together in medium bowl.  Make a well in the dry ingredients. 
  2. Combine wet ingredients. In a second bowl, whisk together the melted butter, sugars, vanilla, egg, and peanut butter.
  3. Combine wet and dry ingredients. Using rubber spatula, fold dry ingredients into wet mixture until just combined; do not overmix.
  4. Add mix-ins. Fold in Reese’s candies and chocolate chips until even mixed. Spread batter into prepared pan, smoothing top with rubber spatula. I like to sprinkle on a few extra chocolate chips and Reese’s pieces for presentation.
four step by step photo collage of making peanut butter blondies

Baking Your Blondies

Once the dough is made, you want to then spread the batter into your pan. I find the dough can be a bit sticky to spread so if you’re having trouble try spraying your spatula with cooking spray to help. Or spray a piece of plastic wrap and use that to press the dough into the pan using your hands.

These peanut butter blondies will bake for about 22 to 25 minutes. You may be tempted to bake them longer but don’t! They may look underdone slightly in the middle but will continue to set up as they cool. If you continue to bake them they will get dried out and become hard.

Tips For Cutting These Bars

You could just bring the whole pan to your party and call it a day. No one would care once they taste one. But if you want to cut them into attractive bars here a few tips:

  • Line Your Pan. First, line your pan with tinfoil and spray lightly with cooking spray. This will make it easier to simply lift out the entire pan at once and cut into bars.
  • Allow them to cool. Completely. Cutting them warm is just going to end up in a GIANT disaster. Let them sit on the counter until they come to room temperature. I pop mine in the fridge to hurry up this process and help to firm up the bars before cutting. Usually at least an hour if not longer if I can wait that long!
  • Use a plastic knife! Plastic does not conduct heat like a metal knife will so it will cut through the bars easily without warming up that chocolate inside! You will have nice clean cuts and pretty bars to present in the end!
peanut butter blondie recipe

Recipe FAQ’s

How long do these peanut butter blondies last?

You can store these bars for up to a week, covered at room temperature.

Can I make these ahead of time?

Yes I love making these the day before, covering them, and letting them set up so they are perfect to serve the next day.

Can I freeze these peanut butter blondies?

Peanut butter blondies can be frozen for up to 3 months. Thaw at room temperature before serving.

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peanut butter blondie recipe

Peanut Butter Blondies

These Reese’s peanut butter blondies are made in one bowl and under 30 minutes!
5 from 6 votes
Print Pin Rate
Course: Dessert
Cuisine: easy
Prep Time: 20 minutes
Cook Time: 25 minutes
Total Time: 45 minutes
Servings: 16 bars
Calories: 377kcal

Ingredients

  • 1 1/2 cups (180 g) all purpose flour *spooned and leveled
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt *I use fine sea salt
  • 12 tablespoons (1 1/2 sticks, 3/4 cup, 170 g) unsalted butter melted and slightly cooled
  • 1 cup (213 g) packed light brown sugar
  • 1/2 cup (100 g) granulated white sugar
  • 1/2 cup (135 g) smooth peanut butter
  • 2 large eggs room temperature
  • 1 Tablespoon vanilla extract
  • 1 cup (170 g) semi-sweet chocolate chips
  • 1 cup (170 g) Reese's Pieces

Instructions

  • Prep oven and pan. Adjust oven rack to middle position; heat oven to 350° F. Line a 13 by 9-inch baking pan with foil, leaving enough overhang to help you lift the blondies from the pan when they're done. Spray with cooking spray and set aside. (you can also use parchment paper)
  • Combine dry ingredients. Whisk flour, baking powder, and salt together in medium bowl.  Make a well in the dry ingredients. 
  • Combine wet ingredients. In a second bowl, whisk together the melted butter, sugars, vanilla, egg, and peanut butter.
  • Combine wet and dry ingredients. Using rubber spatula, fold dry ingredients into wet mixture until just combined; do not overmix.
  • Add mix-ins. Fold in Reese's candies and chocolate chips until even mixed. Spread batter into prepared pan, smoothing top with rubber spatula. I like to sprinkle on a few extra chocolate chips and Reese's pieces for presentation.
  • Bake. Bake until top is shiny, cracked, and light golden brown, 22 to 25 minutes; do not overbake. Bars may look slightly underdone in the middle. Cool on wire rack to room temperature. Remove bars from pan by lifting foil overhang and transfer to cutting board. Cut into bars and serve.

Notes

  • Storage: I store mine covered at room temperature for a week. 
  • Freezing: You can freeze these blondies for up to 3 months. Thaw at room temperature before serving.
  • Do not overbake: The key to to these blondies is too not overbake them! They might not look done at 25 minutes, but take them out. They will set up after they bake. 
  • Peanut butter: Be sure to use a regular peanut butter not an all natural peanut butter that might be too oily for the blondies. Just a good old Jif or Skippy will be perfect.

Nutrition

Calories: 377kcal | Carbohydrates: 44g | Protein: 6g | Fat: 21g | Saturated Fat: 11g | Trans Fat: 1g | Cholesterol: 47mg | Sodium: 146mg | Potassium: 220mg | Fiber: 2g | Sugar: 31g | Vitamin A: 302IU | Calcium: 49mg | Iron: 2mg
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16 Comments

  1. 5 stars
    Will definitely make these again. Delicious!

    1. glad you loved them!

  2. This recipe is amazing! I’ve made it for a birthday party and everyone absolutely loved it! Have been asked for the recipe and directed them to this page. Yummiest ever!!

    1. aw that’s awesome Kathy thank you so much!

  3. 5 stars
    This is such a great recipe. Easy and delicious. I love that they are great for road trips too.

    1. Yes perfect for road trips 🙂

  4. 5 stars
    Peanut butter, chocolate chips and Reese’s pieces? This is one amazing blondie! Ready to dig in to a batch of these right now!

  5. kushigalu says:

    Love peanut butter and I will make these bronies soon. Thanks fir sharing.

    1. thank you you’re most welcome 🙂

  6. 5 stars
    You certainly made 3 kids and one adult very happy when I made these they went nuts, should have made a double batch they were gone in a NY Minute!

    1. aw that’s awesome to hear Claudia!

  7. Can you freeze this? The recipe is great. I did cut the sugar back a little, and used dark 60% Ghirardelli chips. Thank you!

    1. Absolutely you can! Just let them cool and then freeze in an ziploc bag or airtight container. I like to wrap in plastic wrap or tinfoil first to add protection.

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