Peanut Butter Swirl Brownies

Incredibly gooey and delicious, this recipe for peanut butter swirl brownies takes these little morsels up a million notches! They keep for days and can be frozen!

Originally posted on November 2014, the text and images have been updated to serve you better. 

The combination of peanut butter and chocolate never ceases to amaze me for how delicious it is.

I took them to the office and boy, were they a hit! People raved about them and at one point I had a shadow following me around the office asking for an encore, not the recipe mind you, just another batch ‘whenever you feel like baking them again’.

And they are as easy to make as they look. No need for fancy equipment or complicated techniques. Just two simple mixtures baked together until gooey.

Steps for making swirl brownies:

1. Make the brownie base. This recipe is one-bowl, which means you melt the chocolate and butter and add the rest of the ingredients to the same bowl.
2. Spread the batter in the prepared pan.
3. For the peanut butter swirl, mix all ingredients in a bowl.
4. Put dollops over the brownie base (image above). Don’t add a layer as it will not have the same effect.
5. Marble or swirl using the tip of a knife (image below). Do this lightly for better results.
6. Bake until dry but the center is still jiggly.
7. Let cool and cut. I like to eat them the next day. I find the flavor is much better.

Tips & tricks for making this recipe:

• Peanut butter: I always make them with commercial peanut butter, the traditional type, but they do work with natural peanut butter also.
• Swirl: when marbling or swirling the peanut butter mixture do so lightly. We want two distinctive batters to appear.
• Pan size: it’s very important to ensure a fudgy and gooey brownie that bakes well.
• Baking: brownies, in my opinion, should be slightly underbaked to ensure that soft and gooey bite we all love. That means the center should still jiggle when they are removed from the oven.
• Keeping: I suggest eating brownies the next day that they are baked. The flavor is deeper and the texture has time to settle. These can be frozen, well wrapped, for a month at least.

Variation with almond butter.

I have made this recipe as almond butter brownies (they are fantastic and a tad healthier) many times by substituting the following:

• Almond butter for the peanut butter, same amount.
• Cocoa nibs for the cocoa powder: I finely grind 2 tablespoons of cocoa nibs and substitute it for the cocoa powder.
• Coconut sugar: I use it instead of the brown sugar.

The rest of the recipe remains the same.

Other recipes you might like:
Easy Fudgy Cocoa Brownies
Peanut Butter Bread with Chocolate Sauce
No-bake Chocolate Peanut Butter Oat Bars
Double Chocolate Mint Brownies
The Best Dulce de Leche Brownies
Chocolate Coconut Brownies
Triple Chocolate Brownie Cake

Let me know if you make this recipe! I’d love to hear what you think about it.
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Fudgy Peanut Butter Brownies

★★★★★ 5 from 11 reviews

• Author: Paula Montenegro
• Prep Time: 15
• Cook Time: 30
• Total Time: 45 minutes
• Yield: 9 medium squares 1x
• Category: Brownies & Bars
• Method: Baking
• Cuisine: American

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Description

Incredibly gooey and delicious, this recipe for Peanut Butter Swirl Brownies takes these little morsels up a million notches! They keep for days and can be frozen!

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Scale 1x2x3x

Ingredients

For the brownie base:

• 4 oz. (120g) semi-sweet chocolate, coarsely chopped
• 3/4 cup (170g) unsalted butter
• 3/4 cup (1500g) granulated sugar
• 3/4 cup (150g) dark brown sugar
• 3 eggs, at room tº
• 1 tablespoon vanilla extract
• 2 tablespoons unsweetened cocoa powder
• 1 cup (140g) all-purpose flour

For the peanut butter swirl:

• 1/2 cup  peanut butter
• 1/3 cup (40g) powdered sugar
• ½ teaspoon  vanilla
• 2 or 3 Tbs cream

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Instructions

For the brownie base:

1. Preheat the oven to 350ºF / 180ºC.
2. Line a 9-inch square pan with parchment paper and spray the sides that aren’t lined.
3. Melt the chocolate and butter together in a large glass bowl. I do it in the microwave oven, stirring every 10 seconds, until the chocolate is smooth. You can also do it over a pot of boiling water, careful the bottom doesn’t touch the water, stirring until it’s melted.
4. Mix both sugars into the chocolate.
5. Add the eggs, vanilla, and cocoa. Mix until well combined.
6. Add the flour in 2 parts and mix carefully, but don’t overmix.
7. Spread the batter into the prepared pan.

For the peanut butter swirl:

1. In a medium bowl, mix together peanut butter, powdered sugar, vanilla and cream. Make sure no lumps remain.
2. Drop spoonfuls on top of the brownie base, then swirl lightly with a knife, making sure you leave whole chunks of peanut butter mix intact. Otherwise it all blends together and it’s not the same effect.
3. Bake for about 30 minutes, until a tester comes out with fudgy remains and the top looks dry. It’s important not to overbake them.
4. Let cool on a wire rack completely.
5. I find that they are better the next day. I keep them wrapped in plastic.
6. They can be frozen, well wrapped.

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Notes

Tips & tricks for making this recipe:

• Peanut butter: I always make them with commercial peanut butter, the traditional type, but they do work with natural peanut butter also.
• Swirl: when marbling or swirling the peanut butter mixture do so lightly. We want two distinctive batters to appear.
• Pan size: it’s very important to ensure a fudgy and gooey brownie that bakes well.
• Baking: brownies, in my opinion, should be slightly underbaked to ensure that soft and gooey bite we all love. That means the center should still jiggle when they are removed from the oven.
• Keeping: I suggest eating brownies the next day that they are baked. The flavor is deeper and the texture has time to settle. These can be frozen, well wrapped, for a month at least.

Almond butter brownies variation:

• Almond butter for the peanut butter, same amount.
• Cocoa nibs for the cocoa powder: I finely grind 2 tablespoons of cocoa nibs and substitute it for the cocoa powder.
• Coconut sugar: I use it instead of the brown sugar.
• The rest of the recipe remains the same.

Keywords: peanut butter brownies

adapted from Crazy for Crust and Good Housekeeping Cookbook

Paula Montenegro

A baker for more than 30 years, I love testing recipes and sharing the best of what I find. I'm mostly self-taught with some time spent in baking school. I believe we can all be bakers and cooks with the right instructions and simple ingredients. If you're craving easy recipes with amazing results, you're in the right place. Let's get into the kitchen!