Peanut Butter Stuffed Brownies

Featured in Irresistible Desserts.

Enjoy layers of pure indulgence with fudgy chocolate brownies wrapped around a thick, creamy peanut butter filling. Each bite delivers a rich contrast of textures, from the tender crumb of the brownie to the smooth, salty sweetness of peanut butter. Perfect for anyone seeking a deeply satisfying chocolate and nutty dessert, these bars deliver a deliciously gooey center when served chilled or an extra-rich chew at room temperature. They’re simple to prepare, requiring common pantry ingredients and a bit of patience while the filling freezes. Treat yourself to a slice of pure chocolate and peanut butter bliss!

Ranah
Updated on Wed, 25 Jun 2025 19:12:26 GMT
A plate of chocolate cake with peanut butter and caramel. Pin it
A plate of chocolate cake with peanut butter and caramel. | flavorsfuse.com

Peanut Butter Stuffed Brownies are the ultimate answer for anyone who loves the magical pairing of chocolate and peanut butter. Imagine thick, velvety brownies hiding a creamy peanut butter center that stays perfectly gooey. This recipe creates bakery-style treats that never last long on the counter.

I first made these when my brother came home from college. He devoured them so quickly I had to bake another batch the next day. The memory of those laughter-filled afternoons still makes me smile when I pull out this recipe.

Ingredients

  • Creamy conventional peanut butter: brings that classic salty sweet punch look for brands like Jif or Skippy and avoid natural or oily types for best texture
  • Unsalted butter: ensures a rich flavor be sure it is fresh and high quality for the best taste
  • Semisweet baking chocolate: gives deep chocolate intensity use a good bar not chocolate chips for smoother melting
  • Granulated sugar: sweetens and helps achieve the desirable fudgy crumb
  • Large eggs plus an extra yolk: create that dense chewy texture and a bit of extra richness
  • Vanilla extract: rounds out and enhances the chocolate choose pure over imitation whenever you can
  • All-purpose flour: forms just enough structure sift it if it seems clumpy for the finest crumb
  • Unsweetened cocoa powder: adds extra chocolate punch use Dutch process for deeper color and smoother flavor
  • Fine salt: balances all the flavors and takes the sweetness down a notch

Step-by-Step Instructions

Prepare the Peanut Butter Sheet:
Measure out the creamy peanut butter and microwave it until just pourable but not hot around thirty seconds. Spread it evenly into a lined 8 inch square pan so you get a thick slab that matches the corners. Freeze until firm which takes just about an hour. This step ensures the filling stays thick and perfect while baking.
Melt Butter and Chocolate:
Combine unsalted butter and chopped semisweet baking chocolate in a large microwave safe bowl. Heat it in short bursts stirring between each round so that the chocolate does not scorch. Aim for a silky smooth mixture. This helps guarantee deep cocoa flavor.
Mix in Sugar and Cool:
While the chocolate is still warm whisk in the sugar with plenty of energy until it blends smoothly. Let the mixture cool until it is just barely warm to the touch so your eggs do not cook when added next.
Add Eggs and Vanilla:
Crack in the eggs and extra yolk then drizzle in the vanilla. Whisk this mixture for about a minute. The more you whisk here the shinier and chewier your brownies will be.
Fold in Dry Ingredients:
Gently fold in flour sifted cocoa powder and fine salt with a spatula. Stop mixing as soon as it comes together to keep the brownies soft and fudgy instead of cakey.
Assemble and Layer:
Spread half your batter into your now re lined square pan. Quickly retrieve your frozen peanut butter slab and place it right on top. Pour the rest of the batter evenly over the peanut butter smoothing gently so it is completely covered.
Bake and Cool:
Transfer to a preheated 350 degree oven and bake for about thirty minutes. Check early for doneness if you like them extra gooey. Let the brownies cool in the pan at least thirty minutes then use the parchment to lift and let them cool outside the pan before cutting for the best slices.
A stack of chocolate cake bars. Pin it
A stack of chocolate cake bars. | yummyflavorsrecipes.com

Peanut butter is my weakness and I always sneak a warm corner piece while the rest are still cooling. The flavor combination never stops feeling like a treat straight from a childhood bake sale.

Storage Tips

Store brownies in an airtight container at room temperature for up to three days. For maximum fudginess keep them in the fridge for up to five days. You can also freeze individual pieces tightly wrapped and thaw before serving to keep them fresh for weeks.

Ingredient Substitutions

If you only have natural peanut butter stir it really well to incorporate the oils but expect a slightly softer filling. For a dairy free version swap in vegan butter and chocolate. You can use gluten free flour blend for wheat free brownies but check that your bake time may need adjusting.

Serving Suggestions

Serve these brownies just as they are with a cold glass of milk. For a dessert plate add a scoop of vanilla ice cream and a drizzle of warm chocolate sauce. They also hold up beautifully for potlucks or to wrap up for homemade gifts.

Three pieces of chocolate cake stacked on a white plate. Pin it
Three pieces of chocolate cake stacked on a white plate. | yummyflavorsrecipes.com

A Delicious History

The combination of peanut butter and chocolate is a classic in American baking dating back to the early days of boxed brownie mixes. Stuffed brownies gained popularity for their dramatic layers and crowd pleasing taste proof that simple ingredients can create something unforgettable.

Frequently Asked Questions

→ Can crunchy peanut butter be used for the filling?

For the best texture and even layering, it's recommended to use creamy conventional peanut butter. Crunchy varieties may not spread as smoothly but can add extra crunch if preferred.

→ How do I know when the brownies are done baking?

The brownies should be set at the edges and just slightly gooey in the center. A toothpick should come out with moist crumbs, not wet batter.

→ Can I store these brownies in the fridge?

Yes, they keep well in an airtight container at room temperature for up to 3 days or in the fridge for up to 5 days. Chilling them makes the texture even fudgier.

→ How can I make the brownies less rich?

You can reduce the peanut butter filling to 1 cup or 3/4 cup, depending on your preference for a lighter treat.

→ Is it possible to double the batch?

Absolutely! Use a 9x13 inch pan and bake for approximately the same amount of time, checking doneness as you would for a smaller batch.

→ What is the best way to cut the brownies for clean slices?

Let them cool completely and use a sharp knife wiped clean between slices for even, tidy squares.

Peanut Butter Stuffed Brownies

Fudgy chocolate brownies filled with creamy peanut butter for an irresistible sweet treat.

Prep Time
20 Minutes
Cook Time
30 Minutes
Total Time
50 Minutes
By: Ranah


Difficulty: Intermediate

Cuisine: American

Yield: 16 Servings (16 brownies)

Dietary: Vegetarian

Ingredients

→ Peanut Butter Filling

01 1 1/4 cups (336 grams) creamy conventional peanut butter (not natural style)

→ Brownie Batter

02 10 tablespoons (142 grams) unsalted butter
03 4 ounces (113 grams) semisweet baking chocolate, chopped
04 1 cup (200 grams) granulated sugar
05 2 large eggs
06 1 large egg yolk
07 1 teaspoon vanilla extract
08 1/2 cup (64 grams) all-purpose flour
09 1/4 cup (25 grams) unsweetened cocoa powder, sifted
10 1/4 teaspoon fine salt

Instructions

Step 01

Place peanut butter in a heat-safe bowl and microwave for 20 to 30 seconds until pourable but not hot. Line a metal 8-inch square pan with parchment paper, leaving an overhang. Spread the peanut butter in an even layer in the pan. Freeze for 1 hour or until solid. Lift peanut butter sheet from the pan using parchment, then return it to the freezer while you prepare the brownie mixture.

Step 02

Preheat the oven to 350°F (175°C). Line the 8-inch square pan again with fresh parchment paper, leaving an overhang for easy removal.

Step 03

In a large microwave-safe bowl, combine unsalted butter and chopped semisweet chocolate. Microwave in 30-second intervals, stirring after each, until fully melted and smooth.

Step 04

Add granulated sugar to the hot butter-chocolate mixture and whisk vigorously until combined. Let the mixture cool until just barely warm.

Step 05

Whisk in eggs, egg yolk, and vanilla extract for about 1 minute until well blended and slightly thickened.

Step 06

Using a rubber spatula, stir in all-purpose flour, sifted unsweetened cocoa powder, and fine salt until just combined and no streaks remain.

Step 07

Pour half of the brownie batter into the prepared pan and smooth the top. Carefully position the frozen peanut butter sheet over the batter. Gently spread the remaining brownie batter over the peanut butter layer, covering completely.

Step 08

Bake in the preheated oven for approximately 30 minutes, until just set with a very slightly gooey center. Allow brownies to cool in the pan for 30 minutes, then remove and cool another 30 minutes before slicing and serving.

Notes

  1. Use conventional creamy peanut butter for optimal structure; natural style is not recommended.
  2. Reduce peanut butter to 1 cup or 3/4 cup for a less intense filling layer.
  3. Brownies keep in an airtight container at room temperature for up to 3 days or refrigerated for up to 5 days. Chilling enhances their fudgy texture.
  4. To double the batch, use a 9x13 inch pan and bake for the same length of time.

Tools You'll Need

  • 8-inch square metal baking pan
  • Parchment paper
  • Microwave-safe mixing bowl
  • Rubber spatula
  • Whisk

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains peanuts, eggs, dairy, and gluten.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 294
  • Total Fat: 19 g
  • Total Carbohydrate: 27 g
  • Protein: 6 g