These Peanut Butter Blondies are my favorite chewy blondie recipe with mini Reese’s cups, Reese’s chips, and milk chocolate chips folded into the batter. They have a luscious, creamy Reese’s peanut butter icing on top.
Brace yourselves. These Reese’s Peanut Butter Blondies are insanely good.
It’s my favorite brown butter blondie recipe with mini Reese’s peanut butter cups, Reese’s peanut butter chips, and Ghirardelli milk chocolate chips folded into the batter. And because that just wasn’t enough, I slathered a thick layer of Reese’s peanut butter icing on top.
It’s a Reese’s peanut butter trifecta!
The brown butter blondie perfectly compliments the peanut butter and milk chocolate. It has a slight crunch on the outside but is chewy and dense on the inside with Reese's and milk chocolate in every single bite!
The Reese’s peanut butter icing deserves it’s own moment in the spotlight, because it’s sensational. It is silky smooth and creamy, and it tastes just like the inside of a Reese’s cup but better.
That’s right, I said better.
But…I can’t guarantee that these peanut butter blondies will be around long enough to ice…
I have an aforementioned weakness for those Easter Egg Reese’s because they have a higher filling to chocolate ratio, and these peanut butter blondies strike just that same perfection ratio. It’s like the Golden Ratio but for peanut butter baked goods.
Too far? I didn’t think so!
I like to bake my blondies (and brownies) in a glass baking dish because I have found that, when baked in a metal pan, the outside cooks too quickly and can end up too crunchy when the center is finally cooked. When cooked in glass or pyrex, the blondies will develop a slightly crispy crust around the edges but will still be soft and chewy all the way throughout. Though either is possible. Clearly when I remade these in 2022, I used a pretty vintage baking dish and all was well.
Reese’s Peanut Butter Blondies
Ingredients
For the Blondie:
- 1 ½ cups all-purpose flour
- 2 teaspoons baking powder
- 1 teaspoon kosher salt
- ¾ cup unsalted butter (1 ½ sticks)
- 2 cups light brown sugar (packed)
- 2 large eggs
- 1 teaspoon vanilla extract
- ½ cup Reese’s peanut butter chips
- ½ cup Ghirardelli milk chocolate chips
- 1 cup rounded mini Reese’s cups
Instructions
To make the Blondie:
- Preheat oven to 350°. Generously butter a 13x9x2 inch glass or pyrex baking pan.
- Whisk flour, baking powder, and salt in a medium bowl and set aside.
- Melt butter in a medium skillet over medium heat, swirling several times a minute, until browned bits cling to the bottom of the pan and the butter takes on a slightly nutty aroma. Transfer brown butter to a medium bowl. Be sure to get all the nutty goodness from the pan!
- Add brown sugar and beat, with an electric mixer, until well combined and mixture resembles wet sand, 2-3 minutes.
- Add eggs and vanilla; beat until fluffy, 2 minutes. Add dry ingredients and beat until smooth. The batter will be very thick.
- Fold in milk chocolate chips, peanut butter chips and mini Reese’s cups. Turn out into prepared baking dish.
- Using an offset spatula, evenly spread batter in pan.
- Bake blondie until golden brown or the center no longer jiggles when gently shaken, 20-25 minutes. The toothpick test will not work here because of all the mix-ins. Be careful not to over bake! Let cool completely in pan on a wire rack.
For the Icing:
- Combine butter, milk, and salt in a heatproof bowl; cook over a pan of simmering water (bain marie) until butter is melted and mixture is hot to the touch. Stir frequently.
- Remove from heat and add chips to the bowl; beating with an electric hand mixer until smooth and the chips have completely melted.
- Cool. This step only takes about 15 minutes, especially if you stir it frequently.
- Gradually add in powdered sugar and beat until thick enough to spread but not runny.
- Spread onto cooled blondies with an offset spatula.
kim says
My frosting was runny and not fluffy like yours. I even added a bit more powdered sugar to try to stiffen it up but to no avail. What did I do wrong?
Lindsey says
Hi Kim! I'm sorry! Perhaps the mixture wasn't cool enough before you added the powdered sugar? You could try putting it in the fridge next time to firm up the butter before beating it?
Patty says
Look sooo yummy! Has anyone make these and frozen them ?
Lindsey says
These would be great in the freezer Patty! Fear not!
Amanda says
These are good but extremely sweet. I love sweets and could only eat one piece and I was done. Could use less brown sugar I think and would be just as delicious without the icing.
Ginny Adams says
Holy cow this is good. I could barely get it baked because I couldn't stay out of the batter. I imagine this is what heaven would taste like, if it had a taste
Lindsey says
LOL! I'm glad I'm not the only one who can stop eating the batter! I had the same problem, so you are in good company! I am overjoyed that you loved them! I also couldn't stop eating the icing..."just one more taste, just to be sure..."
Ginny Adams says
I haven't made the icing yet, but if it's as good as the batter, these aren't going to my church tomorrow. Haha my husband will have eaten them all
Lindsey says
Haha! Or you could always make a second batch! 😉
Miss Kim @ behgopa says
Peanut butter and chocolate are so amazing together. I love Reece's cups..I think I'd be addicted to something that's "better". Yum!
I can't help but to think of how sorry I feel for those with nut allergies, missing out on one of life's little pleasures like with the marriage of peanut butter and chocolate. Hehe sorry for bringing up a bummer, but every time I see or eat yummy things with nuts in them, it's what I always think about.
Lindsey says
Such a downer! Lol! I would be so depressed, but then again maybe they don't know what they're missing!
These are fabulous...if you like Reese's then these are your new BFF
Dorothy @ Crazy for Crust says
I am SO craving PB blondies! These sound AMAZING!
Lindsey says
They are!!! You, with your love of PB, would definitely love these blondies. Brown butter AND Reese's. What's not to love?!
Kayle (The Cooking Actress) says
let me get this straight: browned butter blondies, chock full of Reese's goodness AND frosted with with a Reese pb icing??!
*dies*
Lindsey says
lol! They are so good that I ate 4 of them just while shooting...only the ugly ones, of course. It's a job and someone has to do it! 😉
Christin@SpicySouthernKitchen says
OMG! The blondie part already looks fantastic, but that peanut butter icing takes them over the top! Pinning and wishing I had one of these right now.
Lindsey says
Thanks for the pin, Christin! The icing is so ridiculously good. I had to fill the bowl with water so that I would stop eating all the leftover! Eeep!