Keto Peanut Butter Brownies
Learn how to make the best keto peanut butter brownies! These delicious low carb buckeye brownies are rich, fudgy, and topped with creamy peanut butter and chocolate ganache. With only 3 net carbs per serving, they’re perfect for satisfying your sweet tooth without breaking your diet. Whether for a special occasion or just because, these brownies will impress everyone.
Why You’ll Love This Recipe
- Low Carb Delight: These brownies have only 3 net carbs per serving, making them an excellent choice for anyone on a keto diet.
- Irresistible Flavor: The combination of rich chocolate and creamy peanut butter creates a mouthwatering treat that everyone will enjoy.
- Easy to Make: Using FitBake brownie mix simplifies the process while still delivering that homemade taste.
- Versatile Dessert: Perfect for parties, potlucks, or just a cozy night in. You can even enjoy them as a snack!
- Gluten-Free Option: Made with almond flour and sugar-free ingredients, these brownies cater to gluten-sensitive diets.

Tools and Preparation
To whip up these delicious keto peanut butter brownies, you’ll need some essential tools. Having the right equipment makes the process smooth and enjoyable.
Essential Tools and Equipment
- 8×8-inch square baking pan
- Parchment paper
- Mixing bowl
- Electric mixer
- Microwave-safe bowl
- Sharp knife
Importance of Each Tool
- 8×8-inch square baking pan: This size ensures even baking and perfect portion control for your brownies.
- Electric mixer: Makes creating the creamy peanut butter layer quick and easy, ensuring a smooth texture.
- Microwave-safe bowl: Ideal for melting chocolate chips without burning them, giving you a glossy finish.
Ingredients
Learn how to make the best keto peanut butter brownies! These low carb buckeye brownies are rich, fudgy, and topped with creamy peanut butter and chocolate ganache. Only 3 net carbs per serving!
For the Brownies:
- 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)
For the Peanut Butter Layer:
- 2/3 cup creamy peanut butter
- 1/4 cup unsalted butter
- 1/2 cup sugar-free powdered sweetener
For the Chocolate Ganache:
- 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 FitBake brownie mix batter and bake in a square 8×8-inch pan according to package instructions. Allow to cool.
- If making the homemade option:
- Preheat oven to 350°F. Line an 8×8-inch square baking pan with parchment paper.
- Stir all dry brownie ingredients together in a bowl. Add melted butter and eggs, stirring until combined.
- Fold in chocolate chips before spreading the brownie batter into the prepared pan.
Step 2: Bake Your Brownies
- Bake for 15-18 minutes until set but still moist.
- Remove from oven and allow to cool completely.
Step 3: Create the Peanut Butter Layer
- In a bowl, combine peanut butter, powdered sweetener, and 1/4 cup of softened butter.
- Beat with an electric mixer until smooth.
- Spread this mixture evenly on top of cooled brownies. Chill in the refrigerator while preparing the next layer.
Step 4: Make the Chocolate Ganache
- In a microwave-safe bowl, combine chocolate chips and 2 tbsp of butter.
- Heat in 20-second increments until melted, stirring until smooth.
Step 5: Assemble Your Brownies
- Pour melted chocolate over the peanut butter layer and spread evenly.
- Return to refrigerator until set or let it sit at room temperature until firm enough to slice.
Step 6: Slice and Serve
- Once set, slice into 16 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 delightful treat that can be served in various ways. Whether you’re hosting a gathering or enjoying a cozy night in, here are some serving suggestions to elevate your dessert experience.
Pair with Whipped Cream
- Top your brownies with a dollop of sugar-free whipped cream for added creaminess and a touch of sweetness.
Serve with Fresh Berries
- Fresh raspberries or strawberries add a burst of flavor and a pop of color, enhancing the overall presentation.
Create a Brownie Sundae
- Layer your brownie with sugar-free vanilla ice cream and drizzle with chocolate sauce for an indulgent sundae.
Enjoy with Coffee or Tea
- A warm cup of coffee or herbal tea provides the perfect contrast to the rich flavors of these brownies, making for a satisfying snack break.
Add Nut Toppings
- Crushed nuts such as walnuts or pecans on top provide an extra crunch and complement the peanut butter flavor beautifully.
Drizzle with Chocolate Sauce
- For chocolate lovers, a drizzle of sugar-free chocolate sauce can take these brownies to the next level of decadence.
How to Perfect Keto Peanut Butter Brownies
To ensure your keto peanut butter brownies turn out perfectly every time, follow these helpful tips.
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Use Quality Ingredients: High-quality almond flour and cocoa powder enhance flavor and texture. Opt for fresh ingredients.
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Measure Accurately: Precision is key! Use a kitchen scale for accurate measurements, especially for dry ingredients like almond flour.
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Don’t Overbake: Keep an eye on the baking time. Brownies should be fudgy; overbaking will lead to dry treats.
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Chill Before Serving: Allowing brownies to cool and set in the refrigerator enhances their fudginess and makes slicing easier.
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Experiment with Sweeteners: Different sugar-free sweeteners can impact taste. Try erythritol, stevia, or monk fruit for variety.
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Store Properly: Keep leftovers in an airtight container in the fridge to maintain freshness and prevent drying out.
Best Side Dishes for Keto Peanut Butter Brownies
Keto peanut butter brownies pair well with several side dishes that complement their rich taste. Here are some fantastic options to consider:
- Greek Yogurt: A dollop of plain Greek yogurt adds creaminess and tang that balances the sweetness of the brownies.
- Cheese Platter: A selection of soft cheeses like brie or goat cheese creates an interesting contrast in flavors.
- Veggie Sticks: Crisp celery or cucumber sticks offer a refreshing crunch that pairs well with rich desserts.
- Nut Butter Dip: A side of almond or cashew butter can enhance the nutty flavor profile while keeping it keto-friendly.
- Chia Seed Pudding: This creamy dessert is low-carb and provides additional fiber, making it a nutritious pairing.
- Dark Chocolate Bark: Break off pieces of keto-friendly dark chocolate bark for an extra chocolatey treat alongside your brownies.
Common Mistakes to Avoid
Making keto peanut butter brownies can be a delightful experience, but there are some common pitfalls to watch out for.
- Using the wrong sweetener: Not all sweeteners behave the same. Choose a sugar-free option that measures cup-for-cup with sugar or adjust accordingly for best results.
- Overbaking the brownies: Baking too long can lead to dry brownies. Keep an eye on them and test for doneness a few minutes early.
- Skipping the cooling step: Cutting into hot brownies can ruin their texture. Allow them to cool completely before slicing for perfect squares.
- Not measuring ingredients accurately: Baking is a science. Use a kitchen scale or proper measuring cups to ensure precision, especially with flour and sweeteners.
- Ignoring ingredient temperature: Cold ingredients can affect the final product. Make sure items like butter and eggs are at room temperature for better mixing.

Storage & Reheating Instructions
Refrigerator Storage
- Store keto peanut butter brownies in an airtight container.
- They will last up to one week in the refrigerator.
Freezing Keto Peanut Butter Brownies
- Wrap each brownie individually in plastic wrap or aluminum foil.
- Place in a freezer-safe container; they can last up to three months in the freezer.
Reheating Keto Peanut Butter Brownies
- Oven: Preheat to 350°F and reheat for about 5-10 minutes until warmed through.
- Microwave: Heat on medium power for 15-20 seconds per brownie until soft.
- Stovetop: Place in a non-stick pan over low heat, flipping gently until warmed.
Frequently Asked Questions
Here are some common questions about making keto peanut butter brownies.
What makes these Keto Peanut Butter Brownies healthy?
These brownies use almond flour and sugar-free sweeteners, making them low in carbs while still satisfying your sweet tooth.
Can I use regular peanut butter instead of sugar-free?
You can, but it will increase the carb count. For a truly keto-friendly treat, stick with sugar-free options.
How do I store leftover Keto Peanut Butter Brownies?
Store them in an airtight container in the refrigerator for up to one week or freeze them for longer storage.
Can I customize this Keto Peanut Butter Brownies recipe?
Absolutely! You can add nuts, swap chocolate chips for different flavors, or even incorporate other nut butters if desired.
Why did my brownies turn out dry?
Dry brownies may result from overbaking or not using enough fat. Ensure you follow baking times closely and measure ingredients accurately.
Final Thoughts
These keto peanut butter brownies are not just easy to make but also incredibly delicious! Their fudgy texture combined with creamy layers makes them perfect for any occasion. Feel free to customize with your favorite add-ins or toppings to make them truly your own!
Keto Peanut Butter Brownies
Indulge in the rich, fudgy goodness of Keto Peanut Butter Brownies that satisfy your sweet cravings without compromising your low-carb lifestyle. These decadent treats are made with a blend of almond flour and sugar-free ingredients, ensuring they are both gluten-free and keto-friendly. Each brownie is topped with a luscious layer of creamy peanut butter and a glossy chocolate ganache, making them perfect for any occasion—whether it’s a cozy night in or a gathering with friends. Plus, with only 3 net carbs per serving, you can enjoy these guilt-free delights anytime!
- Prep Time: 15 minutes
- Cook Time: 18 minutes
- Total Time: 33 minutes
- Yield: 16 servings
- Category: Dessert
- Method: Baking
- Cuisine: Keto
Ingredients
- FitBake fudge brownie mix
- Blanched almond flour
- Sugar-free sweetener
- Dutch cocoa powder
- Unsalted butter
- Creamy peanut butter
- Sugar-free chocolate chips
Instructions
- Preheat your oven to 350°F and line an 8×8-inch baking pan with parchment paper.
- Prepare the FitBake brownie mix according to package instructions, adding almond flour, sweetener, cocoa powder, melted butter, and eggs until well combined. Fold in chocolate chips.
- Pour the batter into the prepared pan and bake for 15-18 minutes until set but still moist. Allow cooling completely.
- Mix together peanut butter, softened butter, and sweetener until smooth; spread over cooled brownies.
- For the ganache, melt chocolate chips and butter in a microwave-safe bowl until smooth; pour over the peanut butter layer.
- Refrigerate until set, slice into squares, and enjoy.
Nutrition
- Serving Size: 1 brownie (50g)
- Calories: 180
- Sugar: 2g
- Sodium: 150mg
- Fat: 15g
- Saturated Fat: 6g
- Unsaturated Fat: 9g
- Trans Fat: 0g
- Carbohydrates: 10g
- Fiber: 7g
- Protein: 5g
- Cholesterol: 40mg