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    Home » Recipes » Bars & Brownies

    Easy Peanut Butter Swirl Brownies

    Published: Nov 24, 2020 · Modified: Oct 15, 2021 by Beth Sachs · 5 Comments · This post may contain affiliate links.

    Jump to Recipe
    Peanut Butter Brownies in a tin.

    Rich, fudgy and swirled with creamy smooth peanut butter, these decadent peanut butter swirl brownies are sure to become a real hit! I guarantee you won't be able to stop at one!

    Squares of peanut butter brownies.

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    I came to love the chocolate peanut butter flavour combo quite late in life (well, I think I was about 35!) and ever since I just can't get enough of it (I'm still trying to get my kids to appreciate it though).

    These indulgent and rich peanut butter swirl brownies will hit the spot nicely and are the perfect treat any time of the day.

    Best of all they freeze really well, and I'll let you into a little secret...I often enjoy one of the beauties straight out of the freezer. Try it!

    👩‍🍳 Love brownies? You'll want to try my easy rolo brownies too!

    Jump to:
    • ✔️ Why should you try it?
    • 🥘 Ingredients
    • 🔪 Instructions
    • 🍴 Serving suggestions
    • 📖 Variations
    • 🧊 Suitable for freezing?
    • ❓ FAQS
    • 😋Related recipes
    • Recipe
    • 💬 Comments

    ✔️ Why should you try it?

    • Easy to make
    • Can be frozen
    • Rich and decadent

    🥘 Ingredients

    • Butter - use unsalted butter.
    • Dark Chocolate - 70% cocoa solids.
    • Light Muscavado Sugar - 200g is needed and gives the brownies a fudgy texture.
    • Dark Muscavado Sugar - 100g is needed and gives the brownies a lovely smoky undertone.
    • Eggs - 4 large free-range eggs.
    • Plain Flour - 175g is needed
    • Peanut Butter - smooth peanut butter is best for this recipe.

    🔪 Instructions

    The recipe card with ingredient quantities and detailed instructions can be found at the bottom of the post

    One: Melt the butter, chocolate and sugars in a heavy based saucepan. Set aside and allow to cool for 5 minutes.

    Two: Beat in the eggs.

    Three: Stir through the flour.

    Four: Pour the brownie mixture into a prepared tin and dollop with peanut butter (melt in the microwave for 20 seconds to make it a bit runnier). Use a skewer to swirl the peanut butter into the brownie batter and bake in the oven for 30 minutes.

    Step by step photo instructions for making the peanut butter swirl brownies.

    🍴 Serving suggestions

    These brownies are delicious served with a glass of cold milk. They can also double up as an easy pudding served warm with homemade no churn ice cream.

    📖 Variations

    Here a few ways to vary the basic peanut butter brownie recipe;

    • Add a handful of white chocolate chips to the brownie batter to add a bit of sweetness.
    • A handful of unsalted peanuts would add a nice crunchy texture.
    • Try using half dark chocolate and half milk chocolate for a less intense chocolate flavour.

    🧊 Suitable for freezing?

    The cooked and cooled brownies freeze really well. Place the cut brownies in a freezer safe container, separating each layer with non stick baking paper. The brownies can be frozen for up to 3 months.

    ❓ FAQS

    How to neatly cut brownies

    The best way to cut brownies so they have a nice neat edge to to make sure they are fully cooled to room temperature. Another little trick is to place the tin of brownies in the freezer for 10 minutes, which will help you get a clean cut. Don't forget to wipe the knife off between every cut!

    😋Related recipes

    Some more bar and brownie recipes you might like;

    • Raspberry Brownies (gluten-free)
    • Lemon and Blueberry Blondies
    • Courgette Brownies
    • Mini Egg Brownies
    • White chocolate and Cranberry Brownies
    • Dark Chocolate Orange Brownies
    • Easy Nutella Brownies
    • Nutella Blondies
    • Biscoff Blondies
    • M&M Cookie Bars

    Or how about trying this single serving Biscoff Mug Cake for a quick and easy dessert?

    • Easter Rocky Road.
      Easy Easter Rocky Road Recipe
    • Rolo brownies stacked on top of each other.
      Easy Rolo Brownies
    • Mint Aero brownies.
      Easy Mint Aero Brownies Recipe
    • A stack of malteser tiffin bars.
      Best Ever Malteser Tiffin Recipe

    Recipe

    peanut butter swirl brownies in a tin.
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    5 from 5 votes

    Peanut Butter Swirl Brownies

    Rich, fudgy and swirled with creamy smooth peanut butter, these decadent peanut butter swirl brownies are sure to become a real hit! I guarantee you won't be able to stop at one!
    Course Bars, Cake
    Cuisine British
    Prep Time 10 minutes minutes
    Cook Time 30 minutes minutes
    Total Time 40 minutes minutes
    Servings 12
    Calories 562kcal
    Author Beth Sachs
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    Would you like to save this?

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    Equipment

    • Kitchen Scales
    • Saucepan
    • 30 x 20 cm Baking Tin
    • Baking Paper
    • Wooden Spoon
    • Measuring Spoons

    Ingredients

    Metric - US Customary
    • 250 g Butter
    • 300 g Dark Chocolate chopped into pieces
    • 200 g Light Muscovado Sugar
    • 100 g Dark Muscavado Sugar
    • 4 Eggs
    • 175 g Plain Flour
    • 250 g Peanut Butter

    Instructions

    • Preheat the oven to 180°c (160 fan/ 350F/ Gas 4) and line a 30 x 20 cm brownie tin with baking paper
    • In a heavy based saucepan melt together the butter, dark chococlate and sugars. Set aside to cool for 5 minutes.
    • Beat in the eggs.
    • Fold in the flour until everything is combined.
    • Pour the brownie mixture into the tin.
    • Heat the peanut butter for about 20 seconds in the microwave to make it a but runnier then dollop on spoons over the brownie mixture. Use a skewer to make a swirl patter in the brownies.
    • Bake in the oven for 30 minutes. Cool completely before slicing.

    Notes

    The nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors, but we have endeavoured to be as accurate as possible.
    Nutrition Facts
    Peanut Butter Swirl Brownies
    Amount per Serving
    Calories
    562
    % Daily Value*
    Fat
     
    33
    g
    51
    %
    Saturated Fat
     
    10
    g
    63
    %
    Cholesterol
     
    55
    mg
    18
    %
    Sodium
     
    129
    mg
    6
    %
    Potassium
     
    398
    mg
    11
    %
    Carbohydrates
     
    57
    g
    19
    %
    Fiber
     
    4
    g
    17
    %
    Sugar
     
    32
    g
    36
    %
    Protein
     
    15
    g
    30
    %
    Vitamin A
     
    100
    IU
    2
    %
    Vitamin C
     
    1
    mg
    1
    %
    Calcium
     
    84
    mg
    8
    %
    Iron
     
    5
    mg
    28
    %
    * Percent Daily Values are based on a 2000 calorie diet.
    Tried this recipe?Snap a pic and tag @effortlessf00d on Instagram or Twitter

    I'm linking this up to #CookBlogShare which this week is hosted by Karen over at Lavender and Lovage

    More Easy Bars & Brownies

    • Honey flapjacks
      Honey Flapjacks
    • A stack of Biscoff blondies.
      Easy Biscoff Blondies Recipe
    • Flapjacks on a plate.
      Easy Flapjack Recipe
    • Dark chocolate tiffin bars on a wooden board.
      Dark Chocolate and Ginger Tiffin Recipe

    Reader Interactions

    Comments

    1. Carrie Carvalho

      January 12, 2021 at 8:48 pm

      5 stars
      These look insane! Love the combo of peanut butter and chocolate!

      Reply
    2. Karen Booth

      January 13, 2021 at 1:12 pm

      These look insanely good Beth and I bet they are very popular in your house! Thank you SO much for linking up to the first #CookBlogShare of 2021. Karen

      Reply
    3. Cat | Curly's Cooking

      January 16, 2021 at 11:52 pm

      5 stars
      These look absolutely delicious - one of my favourite flavour combinations.

      Reply
    4. Kat (The Baking Explorer)

      January 17, 2021 at 2:30 pm

      5 stars
      Fudgey heaven! Chocolate and peanut butter belong together!!

      Reply
    5. Chloe Edges

      January 26, 2021 at 3:36 pm

      5 stars
      Erm, why haven't I made these yet?!!! Right up my alley!

      Reply
    5 from 5 votes (1 rating without comment)

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    Hi, I'm Beth!

    Mum of three (and two crazy dogs), living in Cornwall, UK. I love creating easy, delicious and fuss-free recipes, perfect for busy families, just like my own.

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