The Creamiest Keto Peanut Butter Pie Recipe
This keto peanut butter pie recipe delivers a thick, mousse-like mascarpone filling layered inside a dark, toasted cocoa almond crust. It stays deeply satisfying whether you serve it slightly chilled or freeze it completely for a firmer, ice-cream-like bite.
Why This Recipe Works: The Science
- Xanthan gum stability: Mixing the thickener with dry sweetener prevents clumps. This holds the whipped cream structure intact for days.
- Mascarpone over cream cheese: Mascarpone has a higher fat content and milder tang. It lets the roasted nut flavor dominate this low carb peanut butter pie.
- Temperature control: Adding the nut butter at room temperature prevents the dairy from seizing up and breaking the emulsion.
Macro Breakdown
Here is the estimated breakdown per slice if you cut the pie into twelve even pieces. Track these numbers if you are watching your daily totals.
- Calories: 495
- Net Carbs: 5g
- Fat: 48g
- Protein: 10g
Building Your Keto Peanut Butter Pie Recipe
Whisk the almond flour and cocoa powder, then stir in the melted butter until it feels like wet sand. Press it firmly into your pie plate and bake for exactly 10 minutes to set the edges.
While the crust cools, you have time to assemble some cold low-carb Caprese skewers for a quick starter. Whisk your powdered sweetener with xanthan gum in a large bowl. Beat the heavy cream until stiff peaks form.
Mixing the Creamy Center
Blend your mascarpone and peanut butter in a separate bowl until completely smooth. Gently fold this mixture into the whipped cream using a flexible spatula. Spread this airy filling into your completely cooled chocolate crust and freeze it for thirty minutes.
Warm the topping ingredients briefly in the microwave. Squeeze thin lines of dark chocolate and peanut butter over the chilled dessert, then scatter chopped salted peanuts across the top.
Tips, Swaps & Storage
- Nut-free swap: Swap the almond flour for sunflower seed flour and use sugar-free sunflower seed butter for the filling.
- Storage rules: Keep this sugar free peanut butter pie wrapped tightly in the fridge for up to four days.
- Watch the temp: Do not rush the cooling step for the crust. A warm base will instantly melt the whipped cream.
- Track your dessert: If you want a lighter finish next time, see how your macros handle my triple berry cobbler instead.
Chilled Peanut Butter and Chocolate Macarpy Pie (Keto-Friendly)
- Prep Time: 20 minutes
- Chilling Time: 2 hours 30 minutes
- Cook Time: 10 minutes
- Total Time: 3 hours
- Yield: One 9-inch pie (serves 12, 1 slice per serving)
- Category: Dessert
- Method: No-Bake / Chilled
- Cuisine: American
Description
This rich and creamy peanut butter pie pairs a dark chocolate almond crust with a deeply flavorful mascarpone filling. Served chilled or frozen, it offers an incredible contrast of smooth textures and crunchy salted peanuts.
Ingredients
Almond-Cocoa Crust
- 2 cups (192g) superfine blanched almond flour
- ⅓ cup (64g) granulated erythritol sweetener
- 3 tablespoons (15g) unsweetened cocoa powder
- 7 tablespoons (99g) unsalted butter, melted
Mascarpone Peanut Butter Filling
- 1 ¾ cups (420ml) heavy whipping cream, cold
- ½ cup (60g) powdered erythritol sweetener
- ¼ teaspoon (1g) xanthan gum
- 8 ounces (226g) mascarpone cheese, room temperature
- ⅔ cup (170g) sugar-free creamy peanut butter, room temperature
- 1 teaspoon (5ml) vanilla extract
- ⅛ teaspoon fine sea salt
Chocolate & Peanut Butter Drizzle
- 2 tablespoons (32g) sugar-free creamy peanut butter
- 1 tablespoon (8g) powdered erythritol sweetener
- 1 tablespoon (15ml) heavy whipping cream
- 1.4 ounces (40g) 90% dark chocolate (about 4 standard squares)
- ¼ cup (35g) chopped salted peanuts
Instructions
- Prepare the oven and pan: Preheat your oven to 350°F. Lightly grease a 9-inch pie plate.
- Mix the crust: In a medium bowl, whisk together the almond flour, granulated erythritol, and cocoa powder. Pour in the melted butter and stir until the mixture resembles coarse, wet sand.
- Form and bake the crust: Transfer the dough to the prepared pie plate. Press it firmly and evenly into the bottom and up the sides. Bake for 10 minutes, or until the edges are just set and fragrant. Set aside to cool completely.
- Whip the cream: In a large bowl, whisk the powdered erythritol and xanthan gum together (this prevents the gum from clumping). Pour in the cold heavy whipping cream and beat with an electric mixer until stiff, structured peaks form.
- Blend the base: In a separate bowl, combine the room-temperature mascarpone, peanut butter, vanilla extract, and fine sea salt. Mix by hand or on low speed until perfectly smooth and creamy.
- Fold and fill: Carefully fold the mascarpone-peanut butter mixture into the whipped cream using a flexible spatula. Work gently to keep the filling light and airy. Spread the filling into the fully cooled crust, smoothing the top. Freeze for 30 minutes to set.
- Prepare the peanut butter drizzle: In a small, microwave-safe bowl, combine the peanut butter, heavy cream, and powdered erythritol. Microwave for 10 to 15 seconds, stirring until smooth and fluid. Transfer to a small zip-top bag and snip off a tiny corner. Squeeze decorative lines over the chilled pie.
- Prepare the chocolate drizzle: Place the dark chocolate in another microwave-safe bowl. Heat in 15-second intervals, stirring in between, until completely melted. Transfer to a second zip-top bag, snip the corner, and drizzle over the pie.
- Garnish and serve: Sprinkle the chopped salted peanuts evenly over the top. Slice and serve immediately for a mousse-like texture, or return to the freezer for at least 2 hours for a firmer, ice-cream-like consistency.
Notes
Why It Works
- Blending the xanthan gum with the dry powdered sweetener before adding the cream ensures it dissolves evenly, stabilizing the whipped cream without creating gummy lumps.
- Moving the vanilla extract and adding a pinch of salt to the mascarpone base highlights the roasted peanut notes and balances the richness of the dairy.
- Warming the topping ingredients slightly ensures clean, professional-looking drizzles that set beautifully on the cold pie.
Common Pitfalls to Avoid
- Warm Crust: Do not add the filling before the crust is entirely cool, or the whipped cream will melt and separate, ruining the pie’s structure.
- Cold Mascarpone: Ensure the mascarpone and peanut butter are at true room temperature. Cold mascarpone will create stubborn lumps that won’t fold smoothly into the whipped cream.
- Overmixing: Fold the heavy cream gently. Aggressive stirring will deflate the air you whipped into the cream, resulting in a dense, heavy pie.
Variations
- Nut-Free Alternative: Substitute the almond flour with an equal volume of sunflower seed flour for the crust, and swap the peanut butter for a sugar-free roasted sunflower seed butter.
- Almond Butter Swap: Replace the peanut butter with a creamy, well-stirred roasted almond butter and use chopped toasted almonds for the garnish.
Allergy Alert
This recipe contains dairy (butter, mascarpone, heavy cream), tree nuts (almonds), and peanuts. Substitute as needed.
Nutrition (per serving — estimates)
Calories: 495 | Total Carbs: 9g (Fiber: 4g, Sugar: 2g) | Net Carbs: 5g | Fat: 48g (Saturated: 22g) | Protein: 10g
Nutritional values are approximate, based on standard reference data (USDA FoodData Central). Actual values vary by brand and exact measurements. For precision, use a tracker like MyFitnessPal or Cronometer.
Nutrition
- Serving Size: 1 slice
- Calories: 495
- Sugar: 2g
- Fat: 48g
- Saturated Fat: 22g
- Carbohydrates: 9g
- Fiber: 4g
- Protein: 10g
The Final Word
This chocolate peanut butter keto pie is rich enough that one slice is plenty. How did your body respond to this high-fat dessert? I always find it helpful to track how long I stay full after a slice.
Quick reminder: I share my macro tracking and recipes here, not medical advice. Check with your doctor before making big dietary changes.
