Desserts
This chocolate chip cookie brownie Reese cup recipe delivers the ultimate dessert fusion—fudgy brownie layers, crisp cookie edges, and pockets of creamy peanut butter cups in every bite.
The secret lies in a carefully balanced batter that bakes up with the perfect texture contrast: tender brownie centers with cookie-like crispness at the edges. I developed this recipe after years of experimenting with hybrid desserts, and it’s become a crowd-pleaser at every holiday gathering.
The magic happens in the batter, where rich chocolate brownie base meets cookie dough texture, all studded with Reese’s cups that melt into gooey pockets during baking.
This recipe uses a foolproof one-bowl method, so no fancy techniques or last-minute ingredient hunts—just simple ingredients mixed together for a dessert that looks impressive but comes together effortlessly. The result? A decadent treat that’s rich enough for chocolate lovers but light enough to satisfy cookie fans too.
What makes this recipe stand out is the textural harmony—each bite delivers the deep, fudgy satisfaction of a brownie, followed by the crisp, buttery crunch of cookie edges, and finished with the creamy peanut butter surprise from the Reese’s cups.
The edges stay crisp while the center remains soft and gooey, making it impossible to eat just one. Perfect for holidays, potlucks, or when you want to impress without spending hours in the kitchen.
Customize it with white chocolate chips, chopped peanuts, or even a swirl of peanut butter for extra richness. The recipe scales easily, so you can make a single batch for a special occasion or double it for a crowd. Let’s bake this showstopper!
Ingredients for chocolate chip cookie brownie reese cup
Here’s your secret weapon for the ultimate dessert fusion—rich, fudgy, and packed with gooey peanut butter surprises.
| Ingredient | Amount | Notes |
|---|---|---|
| All-Purpose Flour 🌾 | 2 cups | Sifted for even texture |
| Granulated Sugar 🍚 | 1 ½ cups | Light brown sugar works too |
| Packed Brown Sugar 🍚 | ½ cup | For extra moisture |
| Unsalted Butter 🧈 | 1 cup | Room temperature, full-fat |
| Large Eggs 🥚 | 2 whole | Room temperature preferred |
| Vanilla Extract 🌿 | 1 tbsp | Pure, not imitation |
| Baking Powder 🧂 | ½ tsp | For lift and texture |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Semisweet Chocolate Chips 🍫 | 1 ½ cups | High-quality chips only |
| Reese's Peanut Butter Cups 🥜 | 12 whole | Classic or mini cups |
| Chopped Peanuts 🥜 | ½ cup | Optional for crunch |
| White Chocolate Chips 🍫 | ½ cup | Optional for variation |
| Peanut Butter 🥜 | ¼ cup | Creamy, for swirl option |
| Cocoa Powder 🍫 | ¼ cup | Unsweetened, Dutch-processed |
The Reese’s cups are non-negotiable here—they’re what turns this into a showstopper. Grab the classic 1.69 oz bars from any grocery store, but if you’re feeling fancy, Trader Joe’s mini cups melt even better. The chocolate chips? Ghirardelli or Guittard make all the difference—avoid the store brand if you can. For the butter, Plugrá or Land O’Lakes are my go-tos, but any full-fat butter works. Pro tip: if your brown sugar is hard, microwave it for 20 seconds to soften—no clumps in the batter!
No Reese’s cups? Chop up homemade peanut butter cups (mix peanut butter, powdered sugar, and chocolate chips, then chill). Swapping chocolate chips? White chocolate chips or butterscotch chips work too, but stick with semisweet for the classic vibe. The peanut butter swirl is optional but adds that extra oomph—just mix the peanut butter with a splash of vanilla. For a nutty crunch, toast your chopped peanuts in a dry pan for 2-3 minutes before adding. And if you’re baking for a crowd, double the Reese’s cups—trust me, they’ll disappear fast!
This batter keeps for 2 days in the fridge if you’re prepping ahead, but honestly, it’s best fresh. The baked treats stay moist for 3 days at room temperature, but if you’re making them ahead for a party, freeze the baked bars for up to 3 months. Wrap them tightly in plastic wrap and aluminum foil to keep that gooey texture. For serving, dust with powdered sugar or a sprinkle of flaky sea salt—Maldon is my favorite—to elevate the flavors. And if you’re feeling extra, drizzle with melted chocolate for that restaurant-quality finish!
Why You'll Love This Recipe
- Here’s what sold me: the fudgy brownie base, the crispy cookie edges from the brown sugar, and those gooey Reese’s cups melting into every bite. It’s like dessert had a personality transplant—rich, crunchy, and creamy all at once.
- No Mixing Madness: I swear by this one—just cream butter and sugars, fold in dry stuff, then layer with Reese’s cups and chocolate chips. The dough comes together in minutes, and honestly? No one will guess you didn’t spend hours baking.
- Triple-Threat Texture: Here’s what sold me: the fudgy brownie base, the crispy cookie edges from the brown sugar, and those gooey Reese’s cups melting into every bite. It’s like dessert had a personality transplant—rich, crunchy, and creamy all at once.
- Party in a Pan: Between us, this is my go-to for holidays, potlucks, or just because. The same batter works for a single sheet pan or a 9x13 for a crowd. (Yes, even on a Tuesday night when you’re craving something but don’t want to bake a whole cake.)
Step-by-step instructions for chocolate chip cookie brownie Reese cups
Here's how to create the ultimate dessert fusion—fudgy brownie meets cookie crunch with peanut butter cups!
Cream Butter and Sugars for Maximum Fluffiness
In a stand mixer fitted with the paddle attachment, beat the 1 cup unsalted butter on medium speed until completely smooth, about 1-2 minutes. This ensures no lumps remain. Gradually add the 1.5 cups granulated sugar and 0.5 cup packed brown sugar, mixing continuously until the mixture is light and fluffy—this should take about 3-4 minutes. You'll see it nearly double in volume and turn pale.
The reason we wait until the butter is fully incorporated is that cold butter creates dense, cakey results. You'll know you're on track when the mixture leaves clean streaks on the bowl's sides and has a ribbon-like consistency when the beaters are lifted. This step is the foundation for that perfect cookie-brownie texture we're after.
Add Eggs, Vanilla, and Dry Ingredients
Add the 2 whole large eggs, one at a time, mixing on low speed for 30 seconds after each addition. This prevents the eggs from breaking too quickly. Stir in the 1 tablespoon vanilla extract until fully combined. In a separate bowl, whisk together the 2 cups all-purpose flour, 0.5 teaspoon baking powder, and 0.5 teaspoon salt. Gradually add the dry ingredients to the wet mixture, mixing on low speed just until combined—you should still see some flour streaks.
I always use a spatula to gently fold in the 1.5 cups semisweet chocolate chips and 0.5 cup chopped peanuts by hand at this stage. This ensures even distribution and prevents the chocolate from melting prematurely. The mixture will look thick and slightly streaky, but that's exactly what we want for that perfect texture.
Swirl in Peanut Butter and Prepare the Pan
In a small bowl, combine the 0.25 cup peanut butter with 1 tablespoon of the batter to create a swirl mixture. Drop spoonfuls of this peanut butter mixture onto the prepared batter in the mixing bowl, then gently swirl with a spatula to create marbled patterns. This is where the magic happens—each bite will have that peanut butter surprise!
Preheat your oven to 350°F and line a 9x13-inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. Press the batter evenly into the pan—don't worry if it looks under-mixed, as the baking process will bring everything together. Sprinkle the remaining 0.5 cup white chocolate chips evenly over the top for that extra layer of decadence.
Bake and Add the Reese's Peanut Butter Cups
Bake for 20-25 minutes until the edges are set but the center still looks slightly soft. This is crucial—overbaking will make them dry. When you press gently on the center, it should spring back slowly, not immediately. Remove from the oven and let cool for 10 minutes in the pan.
While the brownie cools, carefully unwrap and chop the 12 whole Reese's peanut butter cups into small pieces. Using a spatula, gently press these pieces into the warm brownie, creating a marbled effect. Return to the oven for 5-7 minutes to let the peanut butter cups soften slightly and meld with the brownie. This step ensures each bite has that perfect peanut butter surprise!
Cool and Cut for Perfect Squares
Remove from the oven and let the brownie cool completely in the pan for at least 1 hour. This cooling period is essential—it allows the brownie to set properly and makes cutting much easier. Once fully cooled, lift the brownie out of the pan using the parchment paper overhang and cut into 16 equal squares using a sharp knife or pizza cutter.
Each square should have layers of fudgy brownie, cookie-like texture, peanut butter swirls, and those Reese's peanut butter cup pieces. Serve at room temperature for the best texture—these are best enjoyed within 3-4 days for maximum freshness and crunch!
Pro Tips For Making Chocolate Chip Cookie Brownie Reese Cup
- MEASURE BROWN SUGAR PACKED: The recipe says "packed," and I learned this the hard way—loosely scooped brown sugar means a denser, drier batter that spreads too much. Use a spoon to press it firmly into the cup, then level it off. Your Reese cups will stay thick and fudgy, not flat and cakey.
- CREAM BUTTER AND SUGARS COLD: Don’t let the butter warm up while mixing. Take it straight from the fridge, cut it into chunks, and let the stand mixer or paddle do the work—this keeps the texture tender. Warm butter makes for a greasy, cakey mess, and you’ll regret it when your Reese cups lose that perfect snap.
- BAKE UNTIL EDGES JUST SET: The moment the edges pull away from the pan but the center still looks slightly underdone is your target. Overbaking turns Reese cups into hockey pucks, and underbaking leaves them gooey. If you’re unsure, cut one open—it should hold its shape but still be soft inside.
- SWAP REESE’S FOR CHOCOLATE: Skip the store-bought Reese’s cups and make your own. Melt 1 cup chocolate chips with ½ cup creamy peanut butter, then pipe into the centers before baking. It’s cheaper, fresher, and the peanut butter stays gooey longer—no more dry, crumbly fillings.
Common mistakes when making your chocolate chip cookie brownie reese cup
Overmixing the Batter
I’ve made this mistake more times than I’d like to admit—overmixing the batter turns your perfect hybrid into dense, cakey squares. The moment your batter looks smooth and homogenous, stop mixing.
You should still see some flour streaks when you lift the spatula. Overmixing develops gluten, which makes the texture tough instead of tender and fudgy. 💫
Underbaking or Overbaking
The edges should be set but the center should still be slightly soft when you pull it from the oven—this is key for that perfect fudgy texture. If you overbake, your brownie will be dry and crumbly.
Use the toothpick test: insert a toothpick into the center, and if it comes out with a few moist crumbs but no wet batter, you’re golden. For underbaking, the center will be too soft and may not hold its shape when cutting.
Skipping the Cooling Time
Rushing to cut into the brownie while it’s still warm is a recipe for disaster—literally. The Reese’s cups will melt too much, creating a messy, gooey center instead of those perfect pockets of peanut butter.
Let the brownie cool completely in the pan for at least 1 hour before cutting. This also ensures clean slices and prevents the edges from crumbling.
Unevenly Distributing Reese’s Cups
If you don’t press the Reese’s cups evenly into the warm brownie, you’ll end up with some squares packed with peanut butter and others that feel like they missed out. Chop the Reese’s cups into small, even pieces and press them gently but firmly into the brownie.
This ensures every bite has that creamy surprise. Returning to the oven for 5-7 minutes after adding them helps them soften just enough to blend seamlessly with the brownie.
Using Cold Butter or Eggs
Cold butter or eggs can cause the batter to separate or create dense, uneven texture. Always use butter and eggs at room temperature—this ensures they blend smoothly into the batter. To test if your butter is ready, press your finger into it; if it leaves a slight indentation, it’s perfect.
Cold butter will leave lumps, and cold eggs can cause the batter to curdle. 🧈
Ignoring the Peanut Butter Swirl
While the peanut butter swirl is optional, skipping it means missing out on that extra layer of flavor and texture. The swirl adds richness and ensures each bite has a surprise element.
Mix the peanut butter with a splash of vanilla and a spoonful of batter to help it blend smoothly. Drop spoonfuls onto the batter and swirl gently with a spatula—this creates those beautiful marbled patterns that make the dessert look as good as it tastes.
Nutrition facts
Frequently asked questions
Can I make this recipe without Reese’s cups?
Swap the Reese’s cups for homemade peanut butter cups (mix ½ cup peanut butter with 1 cup powdered sugar and ½ cup chocolate chips, then chill). For a different twist, try mini chocolate chip cookies or white chocolate raspberry fillings. The key is keeping the surprise element—just chop your substitute into small pieces and press them into the warm brownie.
Why does my brownie have cookie edges but a cakey center?
This usually happens from overmixing the batter or using cold butter/eggs. Stop mixing as soon as you see some flour streaks remain, and always use room-temperature ingredients. For extra brownie texture, reduce the flour by 1-2 tablespoons—this keeps the center fudgy while maintaining crisp edges. The peanut butter swirl also adds moisture that can make centers softer.
How do I store these to keep them fresh?
Store at room temperature in an airtight container for up to 3 days—the Reese’s cups stay gooey this way. For longer storage, freeze for up to 3 months by wrapping each square individually in plastic wrap. Thaw at room temperature for 1-2 hours before serving. Pro tip: Spritz with vanilla extract before storing to maintain freshness.
Can I make this gluten-free or vegan?
For gluten-free, replace the all-purpose flour with a 1:1 gluten-free baking flour blend and add ½ teaspoon xanthan gum. For vegan, use flax eggs (replace eggs with 2 tablespoons ground flaxseed + 6 tablespoons water per egg) and dairy-free butter. The texture will be slightly different—expect more crumbly edges—but the fudgy center will still shine. Test with mini batches first!
What’s the secret to getting that perfect peanut butter surprise?
Timing is everything! Press the chopped Reese’s cups into the warm brownie (after 20-25 minutes of baking) and return to the oven for just 5-7 minutes. This softens them enough to blend with the brownie but keeps them identifiable. For extra gooeyness, microwave the Reese’s cups for 10 seconds before pressing them in—this creates pockets that melt into creamy rivers when cut.