Keto Peanut Butter Cup Blondies

These keto peanut butter cup blondies are one of my favorite treats to make when I want something sweet but still want to stay on track with my low carb lifestyle.

They’re rich, fudgy, and have that perfect combo of peanut butter and chocolate that just works every single time.

The best part is how simple they are. You mix everything in one bowl, swirl some peanut butter on top, and bake. That’s basically it.

Each blondie is low carb and keto friendly, so you can enjoy dessert without worrying about it. No weird aftertaste, no complicated ingredients.

A sprinkle of flaky sea salt on top takes these over the edge. Trust me, you’re going to want to make a second batch.

Why You’ll Love This Recipe

Tastes Like a Real Peanut Butter Cup – The rich peanut butter swirl with dark chocolate chips gives you that classic candy bar flavor without the carbs.

Perfectly Chewy and Dense – These blondies have a fudgy and chewy center that feels like a real bakery treat.

Beautiful Enough to Share – The peanut butter swirl on top with flaky sea salt makes these look like they came from a fancy bakery.

Super Easy to Make – You just mix everything in one bowl and bake so even beginners can nail this recipe on the first try.

Recipe Ingredients

• 2 cups Almond Flour
• 1/3 cup Melted Unsalted Butter
• 1/2 cup Golden Monk Fruit Sweetener
• 1/4 cup Creamy Peanut Butter
• 2 large Eggs
• 2 tsp Vanilla Extract
• 1/2 tsp Baking Powder
• 1/4 tsp Salt
• 1/2 cup Sugar-Free Dark Chocolate Chips
• 2 tbsp Creamy Peanut Butter for swirl
• Flaky Sea Salt for topping

How To Make

Step 1

Preheat your oven to 350°F (175°C). Line an 8×8 inch baking pan with parchment paper.

Step 2

In a large bowl, whisk together the melted butter, 1/4 cup peanut butter, and golden monk fruit sweetener until smooth and well combined. Add the eggs and vanilla extract and whisk vigorously until the mixture is thick and glossy.

Step 3

Add the almond flour, baking powder, and salt. Stir with a spatula until a thick batter forms. Fold in the sugar-free dark chocolate chips.

Step 4

Spread the batter evenly into the prepared pan. Warm the remaining 2 tablespoons of peanut butter in the microwave for about 15 seconds until very runny. Drizzle it over the batter in lines.

Step 5

Use a toothpick or the tip of a small offset spatula to drag through the peanut butter lines, creating a beautiful swirl pattern across the entire surface.

Step 6

Bake for 22 to 26 minutes, until the top is golden and the edges look set. The center may seem slightly soft but will firm up as it cools.

Step 7

Sprinkle flaky sea salt over the top while warm. Let cool completely in the pan for at least 45 minutes before cutting into 16 squares.

Tips

Let the Butter Cool Before Mixing

After you melt the butter, give it about 5 minutes to cool down before you mix it with the peanut butter and eggs. If the butter is too hot, it can partially cook the eggs when you add them and you’ll end up with little scrambled egg bits in your batter.

It should still be liquid and warm to the touch, just not steaming hot. This also helps the monk fruit sweetener dissolve more evenly into the mixture.

Make the Peanut Butter Swirl Extra Runny

The 2 tablespoons of peanut butter you use for the swirl on top needs to be really thin and pourable. If it’s too thick, it won’t spread across the surface and you’ll just have blobs sitting on top instead of a nice swirl.

Microwave it in 10-second bursts and stir between each one. You want it to drip easily off a spoon. If it’s still too thick after 15 seconds, add half a teaspoon of coconut oil and stir it in. That’ll thin it out perfectly.

Don’t Overbake These

Almond flour blondies go from perfect to dry really fast, so start checking at the 20-minute mark. They should look slightly underdone in the center when you pull them out. The top will be golden and the edges will pull away from the parchment just slightly.

If you wait until the center looks fully set in the oven, they’ll end up crumbly and dry once they cool. They firm up a lot as they sit, so trust the process and take them out while the middle still has a tiny jiggle to it.

More Recipes

• Keto Peanut Butter Cups
• Keto Peanut Butter Swirl Brownies
• Keto Raspberry White Chocolate Blondies
• Keto Chocolate Peanut Butter Cookies
• Low Carb Maple Pecan Blondies

Frequently Asked Questions

Can I use regular peanut butter instead of the creamy kind listed?

You really want to stick with creamy peanut butter for this recipe, especially for the swirl on top. Natural or crunchy varieties can separate or have a grainier texture that makes the swirl harder to achieve and changes how the batter holds together.

If you do use natural peanut butter, make sure to stir it really well first so the oils are fully mixed back in. Just be aware that some natural brands contain added sugar, so always check the label to keep these blondies keto friendly.