Keto Peanut Butter Brownies
Learn how to make the best keto peanut butter brownies! These keto peanut butter brownies are perfect for dessert or a sweet snack. Rich and fudgy, they feature creamy peanut butter and chocolate ganache, making them irresistible. With only 3 net carbs per serving, they fit seamlessly into your low-carb lifestyle. Whether you’re hosting a gathering or just treating yourself, these brownies are sure to impress!
Why You’ll Love This Recipe
- Low Carb Delight: Enjoy these brownies without the guilt; each serving has only 3 net carbs.
- Quick and Easy: Simple to prepare, these brownies take minimal time and effort.
- Rich Flavor: The combination of chocolate and peanut butter creates a decadent treat that satisfies cravings.
- Versatile Treat: Perfect for parties, gatherings, or just an indulgent night in.
- Kid-Friendly: These brownies are loved by both kids and adults alike—great for family treats!

Tools and Preparation
To create these delicious keto peanut butter brownies, you’ll need a few essential tools. Having the right tools makes the process smoother and more enjoyable.
Essential Tools and Equipment
- 8×8-inch square baking pan
- Mixing bowls
- Electric mixer
- Parchment paper
- Microwave-safe bowl
- Sharp knife
Importance of Each Tool
- 8×8-inch square baking pan: This is the ideal size for even baking and easy slicing.
- Electric mixer: Saves time when mixing ingredients smoothly, especially for the peanut butter layer.
- Microwave-safe bowl: Perfect for melting chocolate quickly without burning it.
Ingredients
- 1 bag FitBake fudge brownie mix (prepared according to package instructions)
- 1 cup blanched almond flour (112g)
- 1/2 cup powdered or granulated sugar-free sweetener (96g)
- 1/3 cup Dutch cocoa powder (27g)
- 1/4 tsp baking powder (1g)
- 1/4 tsp salt (1.5g)
- 6 Tbsp unsalted butter (melted) (84g)
- 2 large eggs
- 1/2 cup sugar-free chocolate chips (112g)
- 2/3 cup creamy peanut butter
- 1/4 cup unsalted butter
- 1/2 cup sugar-free powdered sweetener
- 3/4 cup sugar-free chocolate chips
- 2 tbsp unsalted butter
How to Make Keto Peanut Butter Brownies
Step 1: Prepare the Brownie Base
- Prepare the FitBake brownie mix batter as instructed on the package.
- Bake in an 8×8-inch pan according to package instructions.
- Allow to cool completely.
Step 2: Make the Homemade Option (if not using a mix)
- Preheat your oven to 350°F.
- Line an 8×8-inch square baking pan with parchment paper.
- In a bowl, stir together all dry brownie ingredients.
- Add melted butter and eggs; mix until combined.
- Fold in sugar-free chocolate chips gently.
- Spread brownie batter evenly into the prepared pan.
- Bake for about 15–18 minutes and allow to cool.
Step 3: Prepare the Peanut Butter Layer
- In a bowl, combine creamy peanut butter, powdered sweetener, and softened butter.
- Use an electric mixer until smooth and creamy.
- Spread this mixture evenly over the cooled brownies.
Step 4: Create the Chocolate Ganache
- In a microwave-safe bowl, combine sugar-free chocolate chips with two tablespoons of unsalted butter.
- Heat in increments of 20 seconds until fully melted; stir until smooth.
Step 5: Assemble and Chill
- Pour melted chocolate ganache over the peanut butter layer, spreading it evenly.
- Refrigerate until set; you can also let it set at room temperature if desired.
Step 6: Slice and Serve
- Once set, remove from refrigerator and slice into squares using a sharp knife.
- Enjoy your delicious keto peanut butter brownies!
How to Serve Keto Peanut Butter Brownies
Keto peanut butter brownies are a delicious treat that can be enjoyed in various ways. Whether you’re serving them at a party or indulging in a quiet night at home, these brownies offer versatility and flavor.
Pair with Whipped Cream
- Add a dollop of sugar-free whipped cream on top for an extra creamy touch.
Serve with Fresh Berries
- Fresh raspberries or strawberries provide a pop of flavor and color that complements the richness of the brownies.
Drizzle with Sugar-Free Chocolate Sauce
- A drizzle of sugar-free chocolate sauce enhances the chocolatey goodness and makes for an attractive presentation.
Enjoy with a Cup of Coffee
- Pairing these brownies with your favorite coffee brings out their decadent flavors, making every bite even more satisfying.
Top with Chopped Nuts
- Sprinkle some chopped walnuts or pecans on top for added crunch and texture.
How to Perfect Keto Peanut Butter Brownies
To achieve the best results when making keto peanut butter brownies, follow these helpful tips. They will ensure your brownies turn out rich, fudgy, and absolutely delicious.
- Use Room Temperature Ingredients: Eggs and butter should be at room temperature for better mixing and a smoother batter.
- Don’t Overmix: Mix just until combined to maintain the fudgy texture. Overmixing can lead to denser brownies.
- Check Baking Time: Keep an eye on the baking time; underbaking slightly will keep them moist and chewy.
- Cool Before Slicing: Allow the brownies to cool completely before slicing to avoid crumbling and ensure clean cuts.
- Store Properly: Keep leftovers in an airtight container in the fridge to maintain freshness.
Best Side Dishes for Keto Peanut Butter Brownies
Keto peanut butter brownies can be enhanced with complementary side dishes. Here are some great pairings that elevate your dessert experience.
-
Keto Ice Cream
A scoop of sugar-free vanilla or chocolate ice cream adds a creamy contrast to the dense brownies. -
Chia Seed Pudding
This healthy pudding provides a light texture that balances the richness of the brownies while keeping it keto-friendly. -
Greek Yogurt
Serve plain or flavored Greek yogurt as a tangy side that offsets the sweetness of the brownies. -
Coconut Whipped Cream
This dairy-free option offers a luscious topping for those who prefer coconut flavors alongside their dessert. -
Nut Butter Dip
A simple nut butter dip pairs perfectly with each brownie square, intensifying the peanut butter flavor. -
Cheese Platter
A selection of cheese can provide savory notes that contrast nicely with sweet treats like keto brownies.
Common Mistakes to Avoid
Making Keto Peanut Butter Brownies can be easy, but there are some common mistakes you should avoid to achieve the best results.
- Using the wrong sweetener: Not all sweeteners work well in baking. Make sure to choose a sugar-free sweetener specifically designed for baking.
- Overmixing the batter: Mixing too much can lead to dense brownies. Stir just until combined for a fudgy texture.
- Skipping the cooling time: Allow your brownies to cool completely before adding toppings. This helps layers set properly and prevents messiness.
- Not measuring ingredients accurately: Baking is a science! Use a kitchen scale for precise measurements to ensure your brownies come out perfectly.
- Baking at the wrong temperature: Always preheat your oven. Incorrect temperatures can lead to uneven baking and texture issues.

Storage & Reheating Instructions
Refrigerator Storage
- Store brownies in an airtight container for up to 5 days.
- Keep them away from strong-smelling foods to prevent flavor transfer.
Freezing Keto Peanut Butter Brownies
- Freeze in an airtight container or freezer bag for up to 3 months.
- For best results, cut brownies into individual squares before freezing.
Reheating Keto Peanut Butter Brownies
- Oven: Preheat oven to 350°F and heat brownies for about 10 minutes, covered with foil to retain moisture.
- Microwave: Heat individual squares for 15-20 seconds on medium power.
- Stovetop: Place a brownie in a skillet over low heat, cover, and warm for about 5 minutes.
Frequently Asked Questions
Here are some common questions about making Keto Peanut Butter Brownies.
Can I use other nut flours?
Yes, you can substitute almond flour with other low-carb nut flours like coconut flour, but adjust the quantity as needed due to different absorption rates.
Are Keto Peanut Butter Brownies gluten-free?
Absolutely! These brownies are made with almond flour and are naturally gluten-free.
How many carbs are in Keto Peanut Butter Brownies?
Each serving contains only 3 net carbs, making it ideal for low-carb diets.
Can I add other toppings?
Definitely! Feel free to top with nuts, shredded coconut, or additional chocolate chips for extra flavor and texture.
Is peanut butter keto-friendly?
Yes, peanut butter is low in carbs and high in healthy fats, making it a great option for keto diets when consumed in moderation.
Final Thoughts
These Keto Peanut Butter Brownies are not only delicious but also versatile. You can customize them by adding nuts or using different types of nut butter. Give this recipe a try, and enjoy the rich blend of chocolate and peanut butter that will satisfy your cravings without derailing your diet!
Keto Peanut Butter Brownies
Indulge in the rich, fudgy goodness of Keto Peanut Butter Brownies, a delightful treat perfect for satisfying your sweet tooth without compromising your low-carb lifestyle. With just 3 net carbs per serving, these delectable brownies combine creamy peanut butter and luscious chocolate ganache for an irresistible dessert. Ideal for gatherings or a cozy night in, these brownies are sure to impress family and friends alike.
- Prep Time: 15 minutes
- Cook Time: 18 minutes
- Total Time: 33 minutes
- Yield: Serves approximately 16 pieces
- Category: Dessert
- Method: Baking
- Cuisine: Keto
Ingredients
- FitBake fudge brownie mix
- Blanched almond flour
- Sugar-free sweetener (powdered or granulated)
- Dutch cocoa powder
- Unsalted butter
- Eggs
- Sugar-free chocolate chips
- Creamy peanut butter
Instructions
- Prepare the FitBake brownie mix as per package instructions and bake in an 8×8-inch pan. Allow to cool completely.
- To make a homemade version, preheat the oven to 350°F. Mix dry ingredients, then add melted butter and eggs; stir until combined. Fold in chocolate chips and spread into the prepared pan. Bake for 15–18 minutes and cool.
- For the peanut butter layer, blend peanut butter, sweetener, and softened butter until smooth, then spread over cooled brownies.
- Create the ganache by melting chocolate chips with unsalted butter in the microwave until smooth. Pour over the peanut butter layer.
- Chill until set, slice into squares, and enjoy!
Nutrition
- Serving Size: 1 serving
- Calories: 150
- Sugar: 1g
- Sodium: 130mg
- Fat: 12g
- Saturated Fat: 4g
- Unsaturated Fat: 7g
- Trans Fat: 0g
- Carbohydrates: 6g
- Fiber: 3g
- Protein: 5g
- Cholesterol: 60mg