These Ultimate Reese's Stuffed Brookies are a dream come true if you are craving a decadent dessert that is both chewy and fudgy. This easy, one-pan recipe seamlessly layers a melt-in-your-mouth cookie base with a rich, gooey brownie top, hiding a sweet candy surprise directly in the middle. Perfect for potlucks or an easy weeknight indulgence, these loaded peanut butter cup brookies deliver a show-stopping dessert with almost zero effort.

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Why You'll Want to Make Ultimate Reese's Stuffed Brookies
- The Ultimate Chocolate & Peanut Butter Marriage: This decadent dessert brings together four distinct layers of flavor: chewy cookie dough, rich fudgy brownie batter, creamy whole peanut butter cups, and crunchy candy pieces.
- Effortless Box Mix Shortcut: Don't let the impressive, layered cross-section fool you! This recipe utilizes convenience items like Betty Crocker Reese's Pieces Cookie Mix and Reese's Brownie Mix to cut down on measuring and kitchen cleanup.
- Perfect Texture in Every Bite: By layering the ingredients instead of swirling them, you get a distinct, gooey center sandwiched perfectly between a structured cookie base and a fudgy brownie top.
- Incredibly Shareable: Baked in a standard 9x13 pan, this rich dessert easily slices into 24 individual bar cookies, making it a fantastic addition to any party platter.
Ingredients - Here's What You'll Need

Steps to Make Ultimate Reese's Stuffed Brookies
- Preheat oven to 350°F. To make the bottom layer, prepare the Reese's Pieces Cookie Mix dough according to package directions, stopping short of forming and baking the cookies.

- Line a 9x13 baking dish with parchment paper and secure with oven-proof baking clips. Then, put on a pair of vinyl gloves, because the cookie dough will be extremely sticky, and press the prepared cookie dough into the bottom of the pan, making sure to cover the entire bottom of the pan.

- Press a layer of 24 unwrapped Reese's Peanut Butter Cups into the cookie dough.

- Next, prepare the Reese's Brownie mix according to the package directions.

- Then, pour the brownie mixture over the Reese's Peanut Butter Cups and smooth out the mixture using a silicone spatula, making sure to cover all of the peanut butter cups.

- Next, press Reese's Pieces and Reese's Unwrapped Minis into the top of the brownie mixture. Bake in a 350°F oven for 45-50 minutes, or until a toothpick inserted in the center should come out with a few moist crumbs.

- Remove from the oven, place on a wire rack, and allow to cool completely in the pan.

- Once cooled, remove from the pan and peel the parchment away from the brookies. Place on a cutting board, cut into serving-size pieces, and enjoy!

If you are looking to elevate your standard baking routine, these Ultimate Reese's Stuffed Brookies are the ultimate crowd-pleaser to add to your recipe box. Combining the ease of box-mix shortcuts with the decadent visual appeal of a multi-layered pastry shop dessert, they deliver an unforgettable bite that will satisfy even the most intense sweet tooth. Delivering a show-stopping dessert with almost zero effort, they're perfect for potlucks or an easy weeknight indulgence.

Frequently Asked Questions
A Brookie is a delicious dessert that combines the best of two worlds: brownies and cookies! It's made by layering or swirling together brownie batter and cookie dough, then baking it all in one pan. The result is a bar with a chewy cookie base and a rich, fudgy brownie top. Sometimes, people even add a fun element by placing a whole peanut butter cup in the center for an extra gooey surprise, like in this Ultimate Reese's Stuffed Brookies recipe!
Because these bars are loaded with melting peanut butter cups, testing for doneness can be slightly tricky. Look for the edges of the brownie layer to be set and slightly pulled away from the sides. A toothpick inserted into the center should emerge with a few moist crumbs; just be sure you aren't mistaking melted candy filling for underbaked batter!
Yes, these bars freeze beautifully for up to 3 months. Allow the slab to cool completely, cut them into individual serving squares, wrap each piece tightly in two layers of plastic wrap, and store them inside an airtight container. Simply thaw a bar at room temperature whenever a chocolate craving strikes.
Yes, you can use heavy-duty aluminum foil if you run out of parchment paper. Be sure to grease the foil generously with non-stick cooking spray or butter to prevent the sticky dough from gripping the surface. Just like with parchment paper, leave an inch or two of extra foil hanging over the sides of the pan so you can easily lift the cooled slab out for clean slicing.

Recipe Tips and Tricks
- Chill the Sticky Dough: Pop your prepared cookie dough into the refrigerator for 15 to 20 minutes before pressing it into the pan. This brief rest reduces stickiness and makes it significantly easier to pat down into an even base layer.
- Avoid Over-mixing the Brownie Batter: When stirring your brownie mix, fold the ingredients together just until the dry pockets disappear. Over-mixing can incorporate too much air, leading to a cake-like texture rather than the rich, fudgy top layer this recipe is famous for.
- Freeze Your Peanut Butter Cups: For a perfectly defined, gooey center that doesn't completely dissolve into the batter during the long bake time, unwrap your 24 peanut butter cups and place them in the freezer for 10 to 15 minutes before assembling.
- Don't Over-bake: These brookies are all about the gooey center. Keep an eye on them during baking and take them out when the edges are golden brown and the centers are still slightly soft. A toothpick inserted in the center should come out with a few moist crumbs.
Other Great Bar Recipes
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Ultimate Reese's Stuffed Brookies
Equipment
- 9x13 baking pan
- Parchment paper
- oven-proof baking clips
Ingredients
- 2 11.9 oz pouches Betty Crocker Reese's Pieces Cookie Mix
- 1 16 oz box Betty Crocker Reese's Brownie Mix
- 3 Eggs
- 4 tbs Unsalted Butter
- ⅓ c Vegetable Oil
- 3 tbs Water
- 24 Reese's Peanut Butter Cups
- Reese's Unwrapped Minis
- Reese's Pieces Candy
Instructions
- Preheat oven to 350°F.
- Make dough from the Reese's Pieces Cookie Mix according to the package directions.
- Line a 9x13 baking dish with parchment paper and secure with oven-proof baking clips. Then, put on a pair of vinyl gloves, because the cookie dough will be extremely sticky, and press the cookie dough into the bottom of the pan, making sure to cover the entire bottom of the pan.
- Press a layer of 24 Reese's Peanut Butter Cups into the cookie dough.
- Prepare the Reese's Brownie mix according to the package directions. Pour the brownie mixture over the Reese's Peanut Butter Cups, and smooth out the mixture using a silicone spatula, making sure to cover all of the peanut butter cups.
- Press Reese's Pieces and Reese's Unwrapped Minis into the top on the brownie mixture. Bake in a 350°F oven for 45-50 minutes, until a toothpick inserted in the center should come out with a few moist crumbs.
- Remove from the oven, place on a wire rack, and allow to cool completely in the pan.
- Yield 24 servings.














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