Ultimate Peanut Butter Cup Skillet Brownies

These are amazing, gooey skillet brownies made with lots of mini peanut butter cups, peanut butter morsels and white chocolate morsels! Super chocolaty and loaded with peanut butter flavors!

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Ultimate Peanut Butter Cup Brownies from willcookforsmils.com #brownies #Reeses

Brownies are my all time favorite dessert. You got lots of chocolate and they are cake-like but gooey. Of course, I like my brownies gooey, not cakey or fudgy. To make it a little more interesting, I decided to make some brownies that are loaded with my favorite additions. White chocolate morsels, peanut butter cups and peanut butter morsels. Full on chocolate heaven!

I’m sure you’ve noticed just how many skillet recipes I’ve been posting lately. I said it many times and I will say it again, I love my cast iron skillet. I’ve made many recipes in it, some I didn’t even have time to post yet, but what I haven’t made yet was dessert. I had to try making a dessert recipe in my cast iron skillet and brownies were my number one choice… always!

Ultimate Peanut Butter Cup Brownies 3 from willcookforsmils.com #brownies #Reeses

I made a little adjustment to my favorite brownie recipe and I had to size it down for the skillet.

*When making this recipe, please NOTE that it is meant for a 12-inch skillet.*

If you only have a 10-inch skillet and really want to make these, which you should, just don’t pour all the batter in it. Pour it in about 2/3 of the way and cook remaining batter in small ramekins or small baking forms. When I have extra batter, I have a couple of small heart baking forms and I use those for leftover batter as special treats for the boys.

Ultimate Peanut Butter Cup Skillet Brownies 1 from willcookforsmils.com #brownies #Reeses

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Ultimate Peanut Butter Cup Skillet Brownies
Serves: 12 inch skillet
  • ½ cup of butter
  • ¼ cup buttermilk
  • 3 cups of chocolate chips
  • 3 eggs
  • 1 cup of brown sugar
  • 1 tsp vanilla extract
  • 1 cup of flour
  • ½ tsp baking soda
  • ¼ tsp salt
  • 1 cup of mini Reese's PB cups, halved + a few more for topping
  • ½ cup white chocolate morsels
  • ½ cup Reese's PB morsels
  1. Preheat the oven to 350 and make sure that your 12-inch skillet is nicely seasoned. Rub the skillet with little bit of oil, using a piece of per towel, so it's glossy but not wet, on the bottom and up the sides.
  2. In a small sauce pan, over medium to medium low heat, start melting butter. When butter is almost melted, add 3 cups of chocolate chips. When the chocolate starts to melt as well, add buttermilk. Slowly stir until all melted and smooth.
  3. Add brown sugar to a large mixing bowl and pour the melted chocolate/butter mixture in it and whisk together.
  4. Whisk in the eggs, one at a time, mixing after each addition.
  5. Whisk in vanilla extract.
  6. Sift in flour, baking soda and salt. Whisk until just combined and smooth.
  7. Fold in halved mini peanut butter cups, peanut butter morsels and white chocolate morsels.
  8. Pour the batter into the skillet (if using a 10-inch skillet, make sure to fill in ⅔ of the way and save remaining batter to make in ramekins or muffin pan).
  9. Bake for 30-35 minutes, do a toothpick test to make sure that the center is not still runny. If needed, bake for another 5-7 minutes.
Recipe from Lyuba @ willcookforsmiles.com All images and content are copyright protected. Please do not use my images without prior permission. If you want to share this recipe, please simply link back to this post for the recipe. Thank you.

Ultimate Peanut Butter Cup Skillet Brownies 2 from willcookforsmils.com #brownies #Reeses

Check out these great brownie recipes from other bloggers:

Buckeye Brownies from Lil Luna

Homemade Mocha Chocolate Chip Brownies from Mom On Timeout

German Chocolate Brownies from My Baking Addiction

Caramel Milky Way Brownies from Inside BruCrew Life

A Few More Chocolaty Treats From Me:

Salted Caramel Brownie Truffles 4 from willcookforsmiles.com #brownie #truffle #saltedcaramel

Salted Caramel Brownie Truffles

Adult Hot Chocolate 3 from willcookforsmiles.com #hotchocolate #cocktail #hotcocoa

Adult Hot Chocolate

(No Bake) Chocolate Covered Peanut Butter Cheesecake Bites 4 from willcookforsmiles.com #chocolate #cheesecakebites #peanutbutter

Chocolate Covered Peanut Butter Cheesecake Bites


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  1. says

    This looks sooooooooooooooooooo GOOD! Can’t wait to try it!! Saw you on the link up. Great blog, can’t wait to keep coming back to check out new recipes. =D

  2. says

    This looks absolutely wonderful! I have made a skillet chocolate chip cookie, but never a brownie skillet. I think I will have to get my skillets out soon! Thanks for sharing this.

  3. says

    Hi! These brownies look so delicious! The pictures are absolutely tempting and I’m looking forward to try them in my own oven :)
    Visit me if you would like 😉

  4. Jerry Andrews says

    Cooked brownies exactly as prescribed in recipe. At the end of 30 minutes the mix had risen and poured into the bottom of the oven. Smoke began to fill the kitchen. VERY disappointed in this outcome, wasted all of these ingredients. Brownies, oven, and kitchen are cooling off. After making some google searches, several comments suggest turning down the heat and extending the time. Maybe this will save someone ingredients. Perhaps only filling the pan half way will work better. Again, pretty disappointed.

    • lyuba says

      I’m sorry that you had a disappointing experience! Did you use a 12-inch or a 10-inch skillet (or larger/smaller)? The mix will rise even if you lower the temperature, you’d just have to make sure that you are using a large enough skillet.
      Again, I’m sorry it overflowed on you!

  5. ironhive says

    I just finished making these for my wife’s birthday (they’re still warm). She loves anything chocolate + peanut butter, and this got a huge stamp of approval from both of us. Delicious and really quite easy to make. Thanks for sharing!


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