Keto peanut butter brownies are two sugar-free dessert favorites rolled into one! This recipe combines fudgy low carb brownies with an irresistible peanut butter blondie swirl. Ready in 35 minutes and only 3.4g net carbs!
I think it's impossible to decide what's better - chocolate or creamy peanut butter. For me, both are basically essential food groups 😂. And together they are an absolute dream team.
I have a bunch of chocolate brownie recipes on the blog already. There are my fabulously fudgy Keto Brownies, these incredible Keto Cheesecake Brownies and this popular Keto Avocado Brownies recipe, to name a few.
And that's not counting the coconut flour brownies recipe from my keto desserts cookbook!
Today was one of those days when I felt like brownies but wanted to double the pleasure factor. Yes, it was time to revive the chocolate PB combo!
The result is these peanut butter swirl brownies - a mix of fudgy brownies and my (slightly adapted) easy Keto Blondies.
I can't wait for you to try this recipe! There's something about bakes with a swirl that is just irresistible...
Ingredients
Let me talk you through the ingredients:
Almond flour: Gluten free and low in carbs, this is one of my favourite keto flours. Both regular and super-fine almond flour work.
Cacao powder: You can use both cacao or cocoa powder. The difference between the two is that cacao is raw and has more nutritional benefits. Cocoa powder is roasted, which makes it darker and richer. Plus, it's easier to get hold of.
Sweetener: I'm using Lakanto Classic. This is a blend of erythritol and monk fruit. To get a smoother brownie texture, powder it in a food processor or with the attachment of a stick blender before adding it to the batters. (This is not 100% essential but recommended). You can also use another sweetener such as xylitol, allulose or pure erythritol.
Peanut butter: Use a smooth, natural peanut butter with ideally just one ingredient - peanuts.
Eggs: Should be room temperature and beaten. Room temperature eggs will make for a softer batter, which is easier to swirl.
Butter: Melted and cooled. Don't use boiling hot butter in brownie batters - you don't want your eggs to start curdling!
Chocolate chips: Choose sugar free chocolate chips, if available. Alternatively, chop 90% dark chocolate into chunks.
Instructions
This section contains step-by-step instructions and photos that show how to make this recipe. See the recipe card for full information on ingredients and quantities
Brownie batter: Add all the dry ingredients to a mixing bowl and mix well with a fork or spoon.
Add the wet ingredients and stir together using a fork or spatula. Last, stir in the sugar free chocolate chips.
Peanut Butter Batter: Stir together all ingredients with a fork or spoon.
Assembly: Add dollops of brownie batter to your prepared baking tin. Save about 4 tablespoons. Don’t spread.
Spoon the peanut butter batter (save about 4 again) into the gaps and gently shake / smooth the pan to self-level.
Add the reserved brownie batter to the top of the peanut butter batter and dollop the leftover pb batter onto the brownie batter.
Time to make peanut butter swirls! Swirl the batters together using a toothpick. Don’t be tempted to over-swirl or the layers will merge into one!
Last, add the chocolate chips to the top and press in gently.
Bake in the centre of the oven until the edges are cooked but the centre has a slight softness.
Expert Tip
The brownies will be super soft when hot. They firm up as they cool so don’t be tempted to over-bake!
Only slice once they are fully cooled.
They are amazing served with a scoop of sugar free ice cream.
Recipe Variations
To make the recipe dairy-free, replace the butter with coconut oil.
Can't have or don't like almond flour? Simply replace it with coconut flour. Be sure to use only about ¼ cup or 25g of flour. Coconut flour is more absorbent, that's why you need less.
Storage
Although keto bakes are fine stored at room temperature for up to 3 days, I normally store these brownies in the fridge. This way, they stay fresh for about 5-6 days.
Alternatively, slice and freeze for up to 3 months.
More Healthy Peanut Butter Recipes
Keto Peanut Butter Recipes - This is the ultimate post for lovers of the chocolate peanut butter combo. Bookmark and enjoy!
Last but not least, don't miss my Keto Peanut Butter Bread. It is ultra moist and so simple to make.
Tried this recipe? Give it a star rating below!
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Recipe
Keto Peanut Butter Brownies
from Sugar Free LondonerNote: The servings slider only changes the first amount in each line and not any subsequent amounts. Please make your own calculations where necessary.
Equipment
- 28 x 19 x 3.5 cm baking pan
Ingredients
Brownie batter
- ¾ cup / 75g almond flour
- ½ cup / 43g cacao powder
- 1 teaspoon baking powder
- ½ teaspoon salt
- ½ cup / 80g Lakanto Classic powdered, ***see notes
- 2 eggs, beaten room temperature
- ½ cup / 114g butter melted and cooled
- ¼ cup / 45g sugar free chocolate chips or chopped 90% dark chocolate
- 4 tablespoon unsweetened almond milk
PB layer
- ¼ cup / 65g peanut butter smooth
- ⅓ cup / 33g almond flour
- ¼ cup / 57g butter melted and cooled
- 1 egg, beaten room temperature
- ¼ cup / 35g Lakanto Classic powdered, ***see notes
- ½ teaspoon baking powder
- ½ teaspoon vanilla extract
Topping
- ¼ cup / 45g sugar free chocolate chips or chopped 90% dark chocolate
Instructions
- Preheat the oven to 350 F / 180 C. Line a 28 x 19 x 3.5 cm baking tray with greaseproof paper.
Brownie Batter
- Put the Lakanto Classic sweetener in a high speed blender and blitz until powdered. Then, add all the dry ingredients to a mixing bowl and mix well with a fork or spoon.
- Add the wet ingredients to the dry and stir together using a fork or spatula. Last, stir in the chocolate chips.
Peanut Butter Batter
- Place all the ingredients in a bowl. Stir together with a fork or spoon.
Assembly
- Add dollops of brownie batter to your prepared baking tin. Save about 4 tbsp. Don’t spread.
- Spoon the peanut butter batter (save about 4 tablespoon again) into the gaps and gently shake / smooth the pan to self level.
- Add the 4 tablespoon of reserved brownie batter to the top of the peanut butter batter and dollop the leftover pb batter onto the brownie batter.
- Swirl the batters together using a toothpick. Don’t be tempted to over-swirl. Last, add ¼ cup of sugar free chocolate chips to the top and press in gently.
- Bake in the centre of the oven for about 25 minutes until the edges are cooked but the centre has a slight softness.
Darlene Smith
What can I use instead of almond milk? I rarely buy it because it goes to waste before I can use it.
Katrin Nürnberger
Any milk of your choice will work. It is just about adding a wet ingredient to achieve a soft brownie batter.
Asma
Hands down one of the best recipes I have tried Keto or not. Have made it several times and even those sceptical of alternative baking or not a fan of sweets have loved it. I have, however, adjusted the recipe a bit. I use 20 g cacao only and 1,5 batches of the peanut butter batter. I also have it in the oven for 3 min shorter. Your recipes are normally very good and I am so thankful I have found your platform. Please, keep helping us with amazing treats 🙂
Natasha
OMG, heavenly. By far, one of the tastiest keto treats I've ever tried!! Rich yet light and I love the flavour combo. Divine.
Thank you, thank you for this Keto Peanut Butter brownies recipe, you are a gem!
Tessa
The thought of having to make 2 separate lots of batter nearly made me not make it...ugh...another bowl to wash up...however...
This morning I am popping down to a friend's for coffee, and needed something to take which I can eat without the guilt of taking in sugar, so at 10pm last night, I was in the kitchen making these. So glad I did. Of course I've had to sample a slice for breakfast!
Gungy, rich, chocolately, peanuty....and all that ground almonds. Its sublime. A winner!!!!
Christine Duncan
Wow! Amazing! My little boy has a rare form of Epilepsy and has been on a modified Ketogenic diet for years. He went crazy for these delicious brownies, and so did my husband! Thank you!!
Annie
can you use an egg substitute ? I am one of those who can not eat eggs
Thanks.
Katrin Nürnberger
Hi Annie, I have never tried. But you could definitely give this a go with flax eggs. Before you just replace, I would check out a coupe of vegan brownie recipes and compare the amounts used. Generally, brownies should be quite easy to make egg free because you WANT them to be fudgy. And once they are cold, they will probably stick together well.
Bev Kumar
These were by far the best keto brownie I’ve ever made!! I’ve been living a keto lifestyle for more than a couple of years now and my kids have tried almost all kinds of keto desserts over this time. Today I whipped this up and served it with some keto vanilla ice cream and they couldn’t believe how amazing this was! My children compared it to their favorite cookie skillet and ice cream dessert from their favorite restaurant! They even said they plan to go sugar free 100% of the time is they have access to this kind of dessert! Lol. Thank you sooo much for sharing your craft. I even made the peanut butter fudge from your recipe and that is also a hit and I need to now make that on a regular basis! You are remarkable with your creations and please continue to explore and share!! Thank you!! Bev
Trish Juarez
My kids love these brownies but sometimes just like chocolate only. Is there a version/option with chocolate only? Saw some other brownie recipes but they texture of these brownies is more of a hit.
Katrin Nürnberger
I'd just double the ingredients for the brownie layer. YOu may need to increase the baking time a little as there's more volume.
Trish Juarez
Thanks, Karin. I'll give it a try & let you know how it turns out!
Trish Juarez
Hi, Karin. The chocolate only option turned out great. Thank you!