Desserts
This brownie cookie and Reese's recipe combines the best of both worlds—rich, fudgy brownie texture with the signature peanut butter swirls you crave. The secret lies in precise temperature control and a strategic swirl technique that keeps the peanut butter gooey while maintaining a dense, moist center.
I perfected this recipe after years of testing, and it’s now a staple in my dessert rotation for its foolproof results.
The magic happens in the mixing: melted butter and chocolate create a velvety base, while the peanut butter swirl adds a satisfying crunch and creamy contrast.
Baking at the right temperature ensures a crackly top without over-browning, and the addition of crushed Reese’s pieces on top adds extra texture for every bite. This recipe delivers restaurant-quality decadence without requiring advanced baking skills.
By the time these fudgy bites emerge from the oven, you’ll have a pan of golden-edged, crackly-topped treats with rich peanut butter swirls throughout. The combination of chocolate and peanut butter creates a flavor profile that’s impossible to resist, making these perfect for sharing or enjoying solo.
The best part? They stay moist for days, so you can enjoy them whenever cravings strike.
Serve warm with a scoop of vanilla ice cream or drizzle with melted chocolate for an extra touch of indulgence. This recipe is versatile enough for holidays, potlucks, or a simple weekend treat. Let’s get baking—your taste buds will thank you.
Ingredients for brownie cookie and reese's
Rich chocolate, creamy peanut butter, and crunchy Reese’s pieces—this decadent combo delivers the perfect dessert every time.
| Ingredient | Amount | Notes |
|---|---|---|
| Semisweet Chocolate Chips 🍫 | 1 ½ cups | High-quality for rich flavor |
| Unsalted Butter 🧈 | 1 cup | Melted, full-fat for best texture |
| Granulated Sugar 🍚 | 1 ½ cups | Light brown sugar adds moisture |
| All-Purpose Flour 🌾 | 1 cup | Sifted for smooth batter |
| Large Eggs 🥚 | 2 whole | Room temperature for even mixing |
| Vanilla Extract 🌿 | 1 tbsp | Pure extract for authentic flavor |
| Salt 🧂 | ½ tsp | Fine sea salt preferred |
| Creamy Peanut Butter 🥜 | ½ cup | Natural, no added sugar |
| Crushed Reese's Pieces 🍫🥜 | 1 ½ cups | Homemade or store-bought |
| Powdered Sugar 🍚 | ¼ cup | For dusting top layer |
| Milk 🥛 | ¼ cup | Whole milk for creaminess |
| Dark Chocolate Chips 🍫 | ½ cup | 70% cocoa for extra richness |
The chocolate is non-negotiable—Ghirardelli or Ghirardelli baking chips make all the difference. I grab mine at Walmart or Target in the baking aisle, but specialty stores like Whole Foods have even better options. For the peanut butter, Jif Natural or Smucker's Natural are my go-tos (no hydrogenated oils!). The Reese’s pieces? Crush them yourself for maximum crunch—store-bought crushed pieces often have weird additives. And don’t skip the dark chocolate chips—they add depth that semi-sweet alone can’t match.
No peanut butter? Substitute Nutella at half the amount—it’s sweeter but works in a pinch. Out of powdered sugar? Granulated sugar in a blender does the trick. Want extra fudgy brownies? Add 0.25 cup cocoa powder to the dry ingredients. The milk can be swapped for heavy cream if you’re feeling extra indulgent. And if you’re making this ahead, freeze the dough balls for up to 3 months—they bake straight from frozen, just add 5 extra minutes.
These stay moist for 5 days in an airtight container, but honestly, they disappear faster. For parties, double the batch—they’re always a hit. Store leftovers at room temp if you can resist, or refrigerate for up to 1 week. Pro tip: Wrap individually in parchment for easy grab-and-go treats. And if you’ve got extra peanut butter, make a second batch—trust me, you will.
Why You'll Love This Recipe
- Five-Ingredient Magic: I swear, this recipe is my go-to when I’ve got a craving but zero energy. Melt butter, mix in chocolate chips and sugar, fold in eggs and flour—boom. No fancy equipment, no waiting for dough to chill. Honestly, it’s the kind of recipe that makes me feel like a baking genius, even when I’m just stirring with a spatula.
- Reese’s Upgrade: Between us, Reese’s peanut butter cups are already life-changing, but adding them to this dough? That’s where it gets dangerous. The gooey peanut butter swirls cut through the rich, fudgy brownie texture like a dream—no extra steps, just fold them in raw and let the oven work its magic. (Yes, even on a Tuesday night.)
- Party in a Pan: This recipe doubles as dessert and a crowd-pleaser. Bake them in a sheet pan for easy serving—great for potlucks, game day, or when your kid’s soccer team needs snacks that won’t break the bank. I’ve even frozen half the batch for lazy days when I just want to reheat and devour.
- No-Waste Win: Let’s talk leftovers—because they’re inevitable. These stay fresh for days in an airtight container, and the flavor only gets better as the peanut butter softens. Plus, the ingredients are cheap and versatile: that same butter, sugar, and flour make other treats, so you’re not stuck buying specialty items. My wallet thanks me every time.
Step-by-step instructions for fudgy bites with crunchy peanut butter swirls
Here's how to create decadent, gooey brownies with a swirl of peanut butter heaven—every bite packs double the flavor!
Melt Butter and Combine Wet Ingredients
In a large microwave-safe bowl, melt the 1 cup unsalted butter in 30-second intervals, stirring between each, until completely smooth. Let it cool slightly—just warm enough to touch but not hot. Then whisk in the 1.5 cups granulated sugar and 2 whole large eggs until fully combined and glossy.
Stir in the 1 tbsp vanilla extract and 0.5 tsp salt, mixing until everything dissolves. The mixture should look thick and syrupy, like a rich chocolate pudding. This base is the foundation of your fudgy texture, so take your time getting it smooth.
Fold in Dry Ingredients and Chocolate
In a separate bowl, whisk together the 1 cup all-purpose flour and set it aside. Gradually sprinkle the flour over the wet mixture while stirring gently with a spatula—this prevents lumps and keeps the batter light. Fold in the 1.5 cups semisweet chocolate chips and 0.5 cup dark chocolate chips until evenly distributed.
Here's the thing—don't overmix. You want just enough to combine everything, but you should still see small flecks of chocolate throughout. This ensures those melt-in-your-mouth pockets of gooey chocolate in every bite.
Prepare the Peanut Butter Swirl
In a small bowl, mix the 0.5 cup creamy peanut butter with the 0.25 cup milk until smooth and creamy. This is your swirl mixture, and it's what gives these brownies that signature peanut butter crunch. Set it aside while you preheat your oven to 350°F—this is the perfect temperature for even baking without burning.
Line an 8x8-inch baking pan with parchment paper, leaving an overhang on the sides for easy removal. This step is crucial—it prevents the brownies from sticking and makes cleanup a breeze.
Layer and Swirl the Batter
Pour about half of the chocolate batter into the prepared pan and spread it evenly. Using a spoon or offset spatula, create a well in the center. Pour the peanut butter mixture into the well, then gently swirl it into the chocolate batter using the tip of the spoon. This creates those beautiful marbled patterns.
Top with the remaining chocolate batter and spread it evenly over the peanut butter swirl. Sprinkle the 1.5 cups crushed Reese's pieces evenly over the top—they'll add that extra crunch that makes these brownies irresistible. Tap the pan gently on the counter to release any air bubbles.
Bake to Perfect Fudgy Perfection
Bake in the preheated oven for 25-30 minutes. You're looking for the edges to be set but the center still slightly underdone—it should jiggle just a little when you shake the pan. A toothpick inserted in the center should come out with a few moist crumbs, not completely clean.
Here's a pro tip: If the top starts to brown too quickly, loosely cover the pan with aluminum foil to prevent over-browning while still allowing the center to cook through. Let the brownies cool in the pan for 15 minutes before transferring to a wire rack to cool completely. This resting time ensures they set properly and hold their shape when you cut them.
Dust and Serve
Once fully cooled, dust the top generously with the 0.25 cup powdered sugar using a fine-mesh sieve. This adds a beautiful finish and balances the richness of the peanut butter and chocolate. Cut into 16 squares—each one will be a perfect blend of fudgy brownie and crunchy peanut butter swirl.
Serve at room temperature for the best texture. These brownies are best enjoyed within a few days, though I promise you won't have any leftovers. Pair them with a cold glass of milk for the ultimate indulgence!
Pro Tips For Making Brownie Cookie And Reese'S
- MELT CHOCOLATE SLOWLY: I learned this the hard way—dumping chocolate chips straight into hot butter seizes them like a stubborn child refusing to share. Instead, take the pot off heat just before the butter melts completely, then stir in chips until they’re glossy and smooth. The residual heat does the work without burning.
- WEIGH YOUR FLOUR: That scoop-and-sweep method? It’s a cheat code for dense, heavy cookies. Use a kitchen scale for the flour—125g is your target—and spoon it in gently, leveling with a knife. This recipe lives or dies by the flour’s behavior, and measuring by weight cuts the guesswork.
- STOP WHEN CENTERS JIGGLE: Overbaking turns these into hockey pucks. Pull them when the edges are set but the middle still wobbles like Jell-O. If you’re unsure, cut one open—it should look underdone inside. (Yes, they’ll firm up as they cool, but they’ll still be tender.)
- CHILL THE DOUGH: Skipping this step is how you end up with flat, sad cookies. Press the dough into the pan and refrigerate for at least 30 minutes. The fat firms up, preventing spreading, and the texture becomes rich and fudgy instead of greasy. (I know, I know—30 minutes feels like forever, but trust me.)
Flavor customization for this brownie cookie and reese's
Peanut Butter Variations
Swap the creamy peanut butter for crunchy peanut butter to add texture—just mix it with 1 tbsp milk to loosen before swirling. For extra decadence, try Reese’s peanut butter cups (melted) instead of regular peanut butter.
I’ve also used almond butter or cashew butter for nut lovers who want a different twist. 🥜
Chocolate Swaps
Replace semisweet chocolate chips with white chocolate chips for a sweeter contrast, or use dark chocolate (70% cocoa) for a more intense flavor. For a fun twist, add chocolate-covered espresso beans (about 0.5 cup) to the batter—they add a subtle coffee kick that pairs perfectly with peanut butter. 🍫
Texture Boosters
For extra crunch, fold in ½ cup chopped peanuts or ½ cup pretzel bits with the crushed Reese’s pieces. If you love caramel, drizzle ¼ cup caramel sauce over the peanut butter swirl before baking. I’ve also tried adding 1 tsp cinnamon to the batter for warmth. 🌟
Sweetness Adjustments
Reduce the granulated sugar to 1 cup if you prefer less sweetness, or add 2 tbsp maple syrup for depth. For a salted caramel twist, sprinkle flaky sea salt on top before baking. If you love fudge, increase the cocoa powder to 0.33 cup for a denser texture. 💛
Dietary Tweaks
For gluten-free brownies, substitute the all-purpose flour with 1 cup gluten-free 1:1 baking flour. To make them vegan, replace the eggs with 2 flax eggs (2 tbsp ground flaxseed + 6 tbsp water) and use dairy-free butter or coconut oil.
I’ve also made a lighter version with ½ cup Greek yogurt instead of milk. 🌱
Nutrition facts
Frequently asked questions
Can I make these without crushed Reese's pieces on top?
The crushed Reese's pieces add texture, but you can skip them entirely. For a smoother finish, simply omit this step. If you want extra peanut butter flavor without the crunch, try adding 1 extra tablespoon of peanut butter to the swirl mixture instead.
How do I prevent the peanut butter swirl from sinking to the bottom?
Use a cool oven (325°F instead of 350°F) and bake for 5-10 minutes longer to set the bottom layer first. Also, pour the peanut butter mixture into the center well after spreading the first layer of batter—this helps it stay suspended during baking. For extra insurance, chill the pan in the fridge for 15 minutes before baking.
Can I use store-bought crushed Reese's pieces?
Yes, but homemade crushed pieces taste fresher. If using store-bought, check for added oils or preservatives—some brands include these. For best results, crush your own Reese's Pieces in a food processor or bag with a rolling pin. This ensures maximum crunch and flavor in every bite.
Why did my brownies come out cakey instead of fudgy?
This usually happens from overmixing the batter or using too much flour. For fudgy results, mix just until combined and avoid overbaking. Also, make sure your butter and chocolate are fully melted but not hot when mixing. The key is a thick, syrupy consistency—almost like pudding—before baking.
How can I make these ahead of time?
Bake them 1-2 days in advance and store in an airtight container at room temperature. For longer storage, freeze the baked brownies (cut into squares) for up to 3 months. Thaw at room temperature for 1-2 hours before serving. The flavor actually improves as they sit!