Peanut Butter Swirl Brownies are so good! If you’re a peanut butter + chocolate lover like me, you’ll love the layer of brownie, swirl of peanut butter, and then a peanut butter frosting. Easy, from scratch, and perfect for a craving!
Peanut Butter Swirl Brownie Recipe
I haven’t added to my chocolate + peanut butter desserts collection in awhile, but there was a time that that was nearly all I posted.
I’m pretty sure brownie tops my list of favorite dessert and adding a peanut butter swirl makes them even better.
Why you’ll love this peanut butter brownie recipe
Peanut Butter Lovers – This gooey brownie is perfect if you love a lot of peanut butter flavor
Basic Ingredients – You don’t need anything special to whip these up.
Ultimate Dessert – Add a scoop of vanilla ice cream and maybe even some hot fudge or peanut butter sauce to really take these fudgy brownies over the top!
Tools you’ll need
- Mixing Bowls – my favorite with the grippy bottom.
- Silicone Spatulas – I have far too many but they always come in handy!
- Hand Mixer – I use my hand mixer way more than my stand mixer.
- 8×8 Baking Dish – I love that this one comes with a lid for storing leftovers.
Below is a list of the ingredients you’ll need to gather to make this recipe. Scroll all the way down for the full recipe card.
These brownies are made with everyday ingredients. The only thing you might not have on hand are the peanut butter chips but any market (or even Target) should have them in the baking aisle, usually right next to the chocolate chips.
For the brownies
- Butter – I use salted butter because I like the contrast of salty to sweet.
- Sugar – Granulated white sugar is what I’ve tested with.
- Eggs – two large eggs.
- Vanilla Extract – I know vanilla is pricey is expensive right now, but opt for real vanilla if you can. Imitation isn’t the same. I buy it in bulk at Sam’s or Costco or you can make your own.
- Cocoa Powder – Unsweetened cocoa powder.
- Flour – all purpose white flour.
- Salt & Baking Powder – for lift.
- Peanut Butter Chips
- Peanut Butter – I use creamy peanut butter (like Jif or Skippy). I don’t recommend natural peanut butter for these but crunchy would work!
- Chocolate Chips – optional, but encouraged. Semisweet chocolate or I use Ghirardelli 60% more often than not.
For the peanut butter frosting
To make the peanut butter frosting, you’ll need: sugar, milk, shortening, butter, salt, vanilla, and peanut butter. I don’t always have shortening on hand, if you don’t either, you can use all butter.
How to make fudgy peanut butter swirl brownies
- STEP ONE: Beat together the butter and sugar in a large bowl. Then add the eggs and vanilla extract and beat until combined.
- STEP TWO: In another mixing bowl, whisk together the cocoa powder, flour, salt, and baking powder. Beat the flour mixture into the butter mixture until combined. Then stir in the peanut butter chips.
- STEP THREE: Pour the batter into a greased 8×8 baking dish. Microwave the peanut butter to thin in then pour it over the batter and use a butter knife or skewer to gently swirl. Bake for 25 minutes at 350. Allow to cool while you’re making the frosting.
- STEP FOUR: Make the frosting by combining the sugar, milk, butter, shortening, and salt to a saucepan and heating to a boil. Allow to boil for 2-3 minutes untouched. Remove from the heat and stir in the peanut butter and vanilla.
- STEP FIVE: Pour the frosting over the cooled brownies and scatter remaining chocolate chips over the top. Once they get melty, gently swirl them into the frosting with a butter knife or skewer. Let set for about 2 hours before slicing & serving!
How to store leftovers
Leftover brownies should be stored in an airtight container at room temperature for up to 5 days.
Can I freeze them?
Yes, leftover brownies can be frozen in a freezer bag in a single layer for up to 3 months.
Move to the counter to thaw at room temperature when you’re ready to enjoy them.