Peanut Butter Brownies with Peanut Butter Fudge Icing

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This peanut butter brownies recipe is guaranteed to knock the socks off all peanut butter fans. The moist peanut butter brownies are topped with the most decadent peanut butter fudge icing. 

peanut butter brownies

My Starbucks friends have been waiting on this fudgy peanut butter brownies recipe. After a weekend of doing pretty much nothing but baking brownies, I left a message on Facebook for some folks to meet me there to share in the bounteous offerings and was able to unload these puppies with no problem at all. If you’re looking at that photo up there, I bet you can see why!

A lot of people have never had a peanut butter brownie. We’ve had fudge (of course!) and blondies but never the peanut butter ones. When I came across this recipe, I knew I’d have to make them this week! Of course, my grandmother’s peanut butter fudge icing had to be in on the baking as well and the combination of the two turned out an absolutely drop-dead peanut butter brownie recipe!

Peanut butter lovers are going to enjoy every bite of this sweet, moist, rich, and fudgy brownie. I can’t wait for you to dig in!

Recipe Ingredients

Peanut butter brownies

  • All-purpose flour
  • Baking powder
  • Salt
  • Creamy peanut butter
  • Unsalted butter, softened (I use margarine)
  • Sugar
  • Brown sugar
  • Eggs
  • Vanilla extract

Peanut butter fudge icing

  • Sugar
  • Vegetable shortening (I usually use coconut oil these days. If you buy refined coconut oil there is no coconut taste).
  • Peanut butter
  • Milk
  • Butter
  • Vanilla

in a large bowl add the peanut butter and butter.

In a large bowl, add the peanut butter and butter.

Add sugars to mixing bowl.

Next, add your sugars to the peanut butter mixture.

whip the peanut butter brownie ingredients

Whip all that up.

peanut butter brownie batter

It will look like this.

add eggs one at a time to batter.

The instructions say to add eggs one at a time. Sometimes I add them all at once.

Welcome to life on the edge!

add baking soda, flour and salt to brownie batter.

In a separate bowl, place the flour and baking powder and combine it with the brownie batter.

Now we need to add our flour in. Once again the recipe states to gradually do this. I absolutely agree that you should gradually add your flour in when the recipe says to do it.

Just don’t expect me to do it. Here at Southern Plate, we’re busy folks. We wanna eat our food, not build a shrine to it. Just dump it all in and it’ll be fine.

Add vanilla to brownie batter and mix well.

Add the vanilla to the brownie batter and mix well.

add batter to your 8x8 pan

Spray a pan with cooking spray.  Spread your batter into the prepared pan.

You should have a good bit of brownie mix unless you ate some of it back there!

bake at 350 degrees for 30-35 mins

Bake at 350 for 30-35 minutes.

Then let your peanut butter brownies cool while you make the peanut butter frosting.

How to Make Peanut Butter Fudge Icing

Add the icing ingredients to a heavy saucepot.

In a heavy saucepot, add the sugar, shortening, butter, milk, and a wee bit of salt.

Bring icing ingredients to a boil.

Stir that up while bringing it to a boil. Continue stirring this so your sugar doesn’t scorch.

There, now that we have it at a full rolling boil. Stop stirring and set your timer for two minutes.

Take saucepot off the stove and add peanut butter and vanilla.

After two minutes, take it off the eye (or stovetop for our friends up north) and stir in your peanut butter and vanilla extract.

Mix icing ingredients together well and quickly.

Mix that well. Be quick about it because it will start setting up rather soon.

Pour fudge icing over the cooled brownies.

Pour over brownies.

Top icing with salted peanuts if you like.

I sprinkled the top of my peanut butter brownies with salted, roasted peanuts and the salty flavor was just wonderful with the sweetness of the brownies and the icing!

slicing brownies into squares.

Slice them brownies now!

bit of peanut butter brownies

Please be careful not to drool on your keyboard. If you short it out I won’t be buying you a new one.

Storage

  • Store your brownies in an airtight container at room temperature or in the fridge for up to 4 days. 
  • You can also freeze your peanut butter brownies for up to 3 months. Tightly wrap individual portions and then thaw overnight before indulging.

Recipe Notes

While the generic grocery store creamy peanut butter works best in this recipe, if you want to use natural peanut butter, make sure it’s very well stirred before you add it in. I don’t recommend crunchy peanut butter or substituting for a different nut butter like almond butter.

You may also like these recipes:

3 Ingredient Peanut Butter Cookies

Peanut Butter Cheesecake Cookie Bars

Peanut Butter Pie Made the Old-Fashioned Way

Big Batch Brownies

Oreo Stuffed Brownies

Marble Cheesecake Brownies

peanut butter brownies

Peanut Butter Brownies

This peanut butter brownies recipe includes moist peanut butter brownies topped with the most decadent peanut butter fudge icing.
Course: Dessert, Snack
Cuisine: American
Keyword: brownies, peanutbutter

Ingredients

  • 1 cup all-purpose flour
  • 1 tsp baking powder
  • 1/4 tsp salt
  • 1/2 cup creamy peanut butter
  • 6 tablespoons unsalted butter softened (I used margarine)
  • 2/3 cup granulated sugar
  • 1/2 cup firmly packed brown sugar
  • 2 eggs
  • 1 tsp vanilla extract

Instructions

  • Preheat oven to 350. Spray an 8x2 or 9x2-inch pan with vegetable cooking spray.
  • In a small bowl, combine the flour, baking powder, and salt. In a large bowl, beat together the peanut butter, butter, and sugars with an electric mixer until light and fluffy.
    1 cup all-purpose flour, 1 tsp baking powder, 1/4 tsp salt, 1/2 cup creamy peanut butter, 6 tablespoons unsalted butter, 2/3 cup granulated sugar, 1/2 cup firmly packed brown sugar
  • Add eggs, one at a time, then add vanilla and mix well. Add the flour mixture to the wet ingredients and mix until well combined.
    2 eggs, 1 tsp vanilla extract
  • Spread the brownie batter into the prepared pan. Bake for 30 to 35 minutes or until a toothpick inserted in the center comes out clean. Cool completely before cutting.
Tried this recipe?Mention @southernplate or tag #southernplate!

 

bit of peanut butter brownies

Peanut Butter Fudge Icing

Top your favorite cakes or brownies with this decadent peanut butter fudge icing.
Course: Dessert
Cuisine: American
Keyword: icing, peanutbutter

Ingredients

  • 1 1/2 cups sugar
  • 7 tablespoons milk
  • 2 tablespoons vegetable shortening
  • 2 tablespoons margarine
  • 1/4 teaspoon salt
  • 1 teaspoon vanilla extract
  • 1/2 cup creamy peanut butter

Instructions

  • In a heavy saucepot, combine the sugar, milk, shortening, butter, and salt. Bring to a rolling boil while stirring constantly.
    1 1/2 cups sugar, 7 tablespoons milk, 2 tablespoons vegetable shortening, 2 tablespoons margarine, 1/4 teaspoon salt
  • Once it reaches a rolling boil, stop stirring and let it boil for two minutes or until it reaches the soft ball stage (I don't use a thermometer, I just let it boil for two minutes).
  • Remove from the heat and quickly stir in the vanilla extract and peanut butter. Beat until smooth and quickly spread over the brownies. I let mine set a bit in the fridge before cutting and serving.
    1 teaspoon vanilla extract, 1/2 cup creamy peanut butter
Tried this recipe?Mention @southernplate or tag #southernplate!

 

*To read the story behind this icing, click here.

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95 Comments

  1. there goes my whole ‘lose weight b4 my wedding’ plan thanks 😉 I may have to buy another dress, cause I know I’m not going to stop reading ur blog!

  2. Ohmygosh! I was going to make my regular chocolate brownies for a trip to the in-laws, but these are way too tempting. I think I’ll do like you did (re: comment above) and frost 1 pan with peanut butter and one with chocolate. It will be like a brownie Reese’s cup!

    BTW, I tried to friend you on Facebook, but I can’t find you anywhere. Details please?

  3. OH MY!! This is going to be way too good! Hubby is the peanutbutter hound in this house. He says a day without peanutbutter should be criminal. Wait till he catches a glimps of these brownies! Thanks for sharing the Wilton experience with us, and your GrandMother’s recipe too. That is a fantastic marriage for peanutbutter lovers! Let the baking begin! Maybe with these brownies, I can convince him of my urgent ‘need’ for that brownie cutter………..sure gonna try! LOL

  4. I just finished baking these up, and I’m letting it cool before I make the icing. You’re totally right, I did have a little bit of that batter! Yummy! My hubby is going to be happily surprised with these when he gets home tonight!

  5. Yeah, the brownies look great, but I want to put my name on the trip to Ireland. Would it be selfish of me to ask if we could swing by Italy on the way home. No harm in asking!

    I’m sure it is just a “weeeeeeee” bit out of the way!

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