Peanut Butter Swirl Brownies

Peanut Butter Swirl Brownies #gfree

Throughout the blogosphere a lot of food bloggers include either “peanut butter lover” or “chocolate addict” or something like it in their bios. You never see “marshmallow mavin” or “carrot crazy.”

Just a love for one of these foods that is so strong that people, myself included, actually use it to describe themselves. I mean there it is, right up front in the first 25 words: Mother, wife, peanut butter nut. Fascinating.

Now since the 70’s Reese’s has been educating us that these are ” two great tastes that taste great together.” Ah, they are so wise. One bite and I think you’ll agree.

Peanut Butter Swirl Brownies #gfree

Peanut Butter Swirl Brownies #gfree

Peanut Butter Swirl Brownies #gfree

Peanut Butter Swirl Brownies

Yields 12

Adapted from Ina Garten’s Outrageous Brownies Adapted from Martha Stewart’s Peanut-Butter Swirl Brownies Inspired by Laura’s Sweet Spot’s Peanut Butter Swirl Brownies

45 minPrep Time

35 minCook Time

1 hr, 20 Total Time

Save RecipeSave Recipe


For the Peanut Butter Swirl:

6 tablespoons unsalted butter, melted

3/4 cup confectioners' sugar

1 cup + 2 tablespoons smooth peanut butter

1/4 teaspoon salt

3/4 teaspoon pure vanilla extract

For the Brownies:

8 ounces (2 sticks) unsalted butter, cut into pieces

6 ounces semisweet chocolate chopped or chocolate chips (1 cup)

5 ounces unsweetened chocolate, chopped

3 large eggs

1 tablespoon vanilla extract

1/2 cup sugar

3/4 cup dark brown sugar

2 teaspoons baking powder

1/2 cup flour mix A or B

1/2 teaspoon salt


  1. Position the rack in the middle of the oven and preheat the oven to 325 degrees.
  2. Grease a 9 x 12 pan and line it with 2 sheets of parchment or foil in a crisscross pattern. Make sure the parchment overhangs the edges of the pan so you can easily lift out the brownies when they are done. Grease the parchment.
  3. For the Peanut Butter Swirl:
  4. In a medium heatproof or microwave-safe mixing bowl, melt the butter. Add the remaining ingredients and mix together until smooth. Set aside.
  5. For the Brownies:
  6. In another medium bowl, whisk together the flour mix, baking powder, and salt. Set aside.
  7. Melt together the butter, semi-sweet chocolate and the unsweetened chocolate in either a medium bowl set over simmering water or in the microwave. Set aside to cool slightly. Tip: Click to learn how to melt chocolate.
  8. In a large bowl, whisk together the eggs, vanilla, and sugars. Whisk until thoroughly combined and there are no lumps of sugar.
  9. Add the warm chocolate mixture into the egg mixture. Whisk until thoroughly combined.
  10. Add the flour mixture and whisk robustly for at least one minute. Tip: This vigorous whisking helps combine the gluten-free flours into the batter. It’s what makes the brownies nice and fudgey.
  11. Pour one-third of the brownie batter into the prepared pan and spread it evenly with a rubber spatula. Cover the batter with drops of peanut butter mixture (about 1 tablespoon each) spaced about 1 inch apart.
  12. Drizzle the remaining brownie batter on top, and gently spread it to fill the pan. Drop dollops of the remaining peanut butter mixture on top. Take a butter knife and gently run it lengthwise and crosswise through the layers to make the swirl.
  13. Bake for 35 minutes. Do not overbake! They are done when there is a slight crust on the top but your finger still makes an impression. Cool thoroughly on a rack, refrigerate, and cut into 12 pieces.
  14. Nut-free Version:
  15. Use flour mix C instead of flour mix A or B.
  16. Use sunbutter instead of peanut butter.

Peanut Butter Swirl Brownies #gfree

Peanut Butter Swirl Brownies #gfree

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43 thoughts on “Peanut Butter Swirl Brownies

  1. At the risk of sounding a tad narcissistic, but I'm pretty sure the Chocolate + Peanut Butter combo was invented for me. These look perfectly amazing and I'm sure we will be making a batch in the near future! Celeste recently posted...PizzadillasMy Profile
  2. These look SO delicious! I saw your recipe at the Create & Share DIY Link Party this week! I'm definitely going to be making these this weekend for a fall party I'm going to! :) Thanks a ton for sharing this!

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