These are the most peanut-buttery brownies you will ever try! You can substitute your favorite homemade brownie recipe for the mix.

Recipe Summary

prep:
15 mins
cook:
30 mins
additional:
1 hr
total:
1 hr 45 mins
Servings:
24
Yield:
2 dozen brownies
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Ingredients

24
Original recipe yields 24 servings
The ingredient list now reflects the servings specified
Ingredient Checklist

Directions

Instructions Checklist
  • Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.

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  • Stir brownie mix, vegetable oil, 2 eggs, and water in a large mixing bowl until smoothly combined and gently mix the chopped peanut butter cups into the batter.

  • Beat peanut butter, sugar, butter, flour, vanilla extract, and 1 egg together in a bowl with an electric mixer until thoroughly combined. Spread half the brownie batter into the bottom of the prepared baking dish and top with 1/4-cup dollops of peanut butter mixture in an even pattern. Pour remaining brownie batter between the dollops. Use a knife to lightly swirl the peanut butter mixture into the brownie batter; do not overmix.

  • Bake in the preheated oven until a toothpick inserted into the center of the brownies comes out with moist crumbs, 30 to 40 minutes. Cool completely before serving.

Nutrition Facts

321 calories; protein 6g; carbohydrates 31.5g; fat 20.6g; cholesterol 29.2mg; sodium 189.4mg. Full Nutrition
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Reviews (21)

Read More Reviews

Most helpful positive review

Rating: 5 stars
08/05/2012
I whipped these brownies up this morning after seeing LovestoHost's picture. I used a dark chocolate brownie mix and I subtracted a teaspoon of water and added teaspoon of vanilla to the brownie mixture. I also ran the mini Reese's cup through the food processor before adding them to the brownie mixture. I baked these brownies in my Perfect Brownie Pan--baked at 350 they were done in just over 30 minutes. After letting them cool we dug into these brownies. HEAVENLY. One of the best brownies we've ever had. It's already over halfway gone. Read More
(30)

Most helpful critical review

Rating: 3 stars
03/23/2013
I had such high hopes for this recipe but it just didn't work out. The peanut butter part was dry and crumbly and I thought too much for the amount of brownies. I didn't really 'swirl' it in too much so maybe that makes a difference? Also I didn't have any mini pb cups so I added some chocolate chips. I only baked for 35 minutes- at 25 they were still gooey on the edge. I suppose I should always obey my cardinal rule of brownie making: always underbake them. If I try it again I would leave out the flour in the pb mix and maybe increase the sugar. Even the batter tasted odd after I added the flour. Not sure what went wrong. Read More
(7)
26 Ratings
  • 5 star values: 17
  • 4 star values: 5
  • 3 star values: 3
  • 2 star values: 0
  • 1 star values: 1
Rating: 5 stars
08/05/2012
I whipped these brownies up this morning after seeing LovestoHost's picture. I used a dark chocolate brownie mix and I subtracted a teaspoon of water and added teaspoon of vanilla to the brownie mixture. I also ran the mini Reese's cup through the food processor before adding them to the brownie mixture. I baked these brownies in my Perfect Brownie Pan--baked at 350 they were done in just over 30 minutes. After letting them cool we dug into these brownies. HEAVENLY. One of the best brownies we've ever had. It's already over halfway gone. Read More
(30)
Rating: 5 stars
08/04/2012
You really can't go wrong w/Peanut Butter and gooey chocolate can you? I have brownie issues (overdone underdone crumbly battery-y etc) so I decided to try this in mini muffin tins. They worked ok but I never nailed the bake time so some were still gooey and some were overdone. (This will work if you're good w/brownie bake times/doneness. I obviously am not.) I jumped ship and finished the way the submitter intended but in an 8X8 pan since I'd used 1/2 the batter. These worked much better and were delicious. I used a Duncan Hines box mix since it needed to be a 9X13 sized mix. THANK YOU for the recipe Erica! Read More
(13)
Rating: 5 stars
12/04/2012
Made these brownies exactly as the recipe stated with a package of Ghirardelli Chocolate Supreme brownie mix and they were a HUGE hit. Even my health-nut husband ate more of them than I did and requested that I make them again at Thanksgiving for his family. Once again they were gobbled up before the evening was over. Will make this my default brownie recipe from now on! Read More
(12)
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Rating: 3 stars
03/22/2013
I had such high hopes for this recipe but it just didn't work out. The peanut butter part was dry and crumbly and I thought too much for the amount of brownies. I didn't really 'swirl' it in too much so maybe that makes a difference? Also I didn't have any mini pb cups so I added some chocolate chips. I only baked for 35 minutes- at 25 they were still gooey on the edge. I suppose I should always obey my cardinal rule of brownie making: always underbake them. If I try it again I would leave out the flour in the pb mix and maybe increase the sugar. Even the batter tasted odd after I added the flour. Not sure what went wrong. Read More
(7)
Rating: 5 stars
09/15/2013
If you love chocolate and you love peanut butter cups you will love these brownies. I used Duncan Hines Milk Chocolate brownie mix. Took them to a Christening party and they were all gone in just a 1/2 hour. Will definitely be making these again. Read More
(7)
Rating: 5 stars
11/10/2012
Delicious! Read More
(5)
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Rating: 5 stars
08/12/2012
These were amazing!!!!! My whole family loved them.....followed rcipe exactly....made no changes.....perfect recipe for chocolate and peanut butter lovers! Thanks! Read More
(4)
Rating: 5 stars
10/18/2013
This was perfect. I did what another reviewer said I eliminated a teaspoon of water and replaced it with a teaspoon vanilla. probably didn't need to do that. 350 for 32 minutes. Definitely swirl the peanut butter. I made sure I really swirled it so there were no clumps of peanut butter. This is a keeper. Read More
(4)
Rating: 5 stars
07/06/2013
I made these exactly as the recipe stated and they came out perfect. I baked them for 33 minutes. I made them for my son-in-law when his family was visiting for the 4th of July. They got eaten so fast he barely got one! So I made another pan the next day so he could enjoy. If you are a chocolate peanut butter lover this is the recipe for you! Read More
(4)
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