This Keto Peanut Butter Brownie Tart is a show-stopping low-carb dessert that combines three irresistible layers: a dense chocolate brownie crust, a silky peanut butter mousse filling, and a smooth chocolate ganache topping.
It’s rich without being heavy, sweet without sugar, and perfect for holidays, birthdays, or anytime you want a keto dessert that truly feels special. And before we dive in, don’t forget to subscribe by email so you never miss a keto recipe that actually tastes indulgent
Overview of Recipe Content
What This Recipe Is
A keto tart with a baked brownie base, no-bake peanut butter mousse filling, and chocolate ganache topping.
Why You’ll Love It
- Keto & low carb
- No refined sugar
- Rich, creamy, and chocolate-forward
- Perfect make-ahead dessert
- Looks bakery-worthy
What It Tastes Like
Deep chocolate brownie, creamy peanut butter center, and a smooth chocolate finish — basically a Reese’s dream in tart form.
Full & Complete Ingredient List (By Layer)
Layer 1: Keto Brownie Crust
- 1½ cups almond flour
- ¼ cup unsweetened cocoa powder
- ½ cup powdered keto sweetener (monk fruit or erythritol)
- ¼ teaspoon salt
- ½ teaspoon baking powder
- ⅓ cup unsalted butter, melted
- 1 large egg
- 1 teaspoon vanilla extract
Layer 2: Peanut Butter Mousse Filling
- ¾ cup creamy peanut butter (no added sugar)
- ¾ cup heavy whipping cream
- ¼ cup powdered keto sweetener
- 1 teaspoon vanilla extract
- Pinch of salt
Layer 3: Keto Chocolate Ganache
- ½ cup sugar-free chocolate chips
- ¼ cup heavy cream
How to Make Keto Peanut Butter Brownie Tart
Step 1: Prepare the Crust
Preheat oven to 350°F (175°C). Grease a 9-inch tart pan with removable bottom.
Mix almond flour, cocoa powder, sweetener, salt, and baking powder. Stir in melted butter, egg, and vanilla. Press evenly into pan.
Bake for 12–15 minutes. Cool completely.
Step 2: Make the Peanut Butter Mousse
Whip heavy cream until soft peaks form.
In another bowl, mix peanut butter, sweetener, vanilla, and salt. Gently fold whipped cream into peanut butter mixture until smooth and fluffy.
Spread evenly over cooled brownie crust. Chill 30 minutes.
Step 3: Add Chocolate Ganache
Heat cream until just steaming. Pour over chocolate chips and let sit 1 minute, then stir until smooth.
Pour ganache over peanut butter layer and spread evenly. Chill until set, about 1 hour.
What to Serve with This Tart
- Espresso or strong coffee
- Unsweetened almond milk
- Fresh raspberries (optional, low-carb friendly)
Tips for Making It Perfect
- Use powdered sweetener for smooth layers
- Chill between layers for clean lines
- Natural peanut butter works best if well-stirred
- Slice with a warm knife for perfect cuts
Storage Instructions
- Refrigerator: Up to 5 days
- Freezer: Up to 2 months (slice first)
- Serve chilled for best texture
General Information
Peanut butter and chocolate have long been a classic American pairing. This keto tart keeps that nostalgic flavor while using low-carb ingredients that deliver the same indulgence — no sugar crash required.
Frequently Asked Questions
Is this fully keto?
Yes — all ingredients are low carb and sugar free.
Can I make it dairy-free?
Use coconut cream and dairy-free chocolate.
Is the brownie crust fudgy or cakey?
Fudgy and dense — perfect for a tart base.
Can I make this ahead?
Absolutely — it’s even better chilled overnight.
Conclusion
This Keto Peanut Butter Brownie Tart is rich, elegant, and deeply satisfying — proof that keto desserts can still feel luxurious. If you love chocolate-peanut butter combinations, this one belongs at the top of your list.
You may also love:
- https://poulef.com/keto-desserts/
- https://poulef.com/low-carb-chocolate-recipes/
- https://poulef.com/peanut-butter-desserts/
- https://poulef.com/keto-no-bake-desserts/
- https://poulef.com/almond-flour-desserts/
Interactive Elements
Made this tart?
Leave a review, drop a comment, and share your slice on Pinterest:
https://www.pinterest.com/poulefrecipe/
Nutritional Information (Per Slice – Approximate)
| Nutrient | Amount |
|---|---|
| Calories | 340 |
| Fat | 30g |
| Saturated Fat | 14g |
| Carbohydrates | 8g |
| Fiber | 4g |
| Net Carbs | 4g |
| Protein | 9g |
| Sugar | 0g |
Keto Peanut Butter Brownie Tart (Like a Giant Sugar-Free Peanut Butter Cup!)
- Total Time: 1 hour 40 minutes
- Yield: 10 slices 1x
Description
Keto peanut butter brownie tart with fudgy chocolate crust, creamy peanut butter mousse, and sugar-free chocolate ganache.
Ingredients
Brownie Crust:
1 1/2 cups almond flour
1/4 cup unsweetened cocoa powder
1/2 cup powdered keto sweetener
1/4 tsp salt
1/2 tsp baking powder
1/3 cup unsalted butter, melted
1 large egg
1 tsp vanilla extract
Peanut Butter Mousse:
3/4 cup creamy peanut butter
3/4 cup heavy whipping cream
1/4 cup powdered keto sweetener
1 tsp vanilla extract
Pinch of salt
Chocolate Ganache:
1/2 cup sugar-free chocolate chips
1/4 cup heavy cream
Instructions
1. Preheat oven to 350°F and prepare tart pan.
2. Mix brownie crust ingredients and press into pan.
3. Bake 12–15 minutes and cool completely.
4. Whip cream to soft peaks.
5. Mix peanut butter, sweetener, vanilla, and salt.
6. Fold whipped cream into peanut butter mixture.
7. Spread over crust and chill 30 minutes.
8. Heat cream and melt chocolate for ganache.
9. Pour ganache over mousse and chill until set.
Notes
Use powdered sweetener for smooth texture.
Chill between layers for best results.
Serve chilled.
- Prep Time: 25 minutes
- Cook Time: 15 minutes
- Category: Dessert
- Method: Baking
- Cuisine: American
Nutrition
- Serving Size: 1 slice
- Calories: 340
- Sugar: 0g
- Sodium: 160mg
- Fat: 30g
- Saturated Fat: 14g
- Unsaturated Fat: 16g
- Trans Fat: 0g
- Carbohydrates: 8g
- Fiber: 4g
- Protein: 9g
- Cholesterol: 75mg
Table of Contents
Gianna Poulef
I’m Gianna Poulef from Poulef Recipes. I love sharing perfected dishes from my kitchen. I’m sure they’ll earn a spot in your heart. Let’s savor this journey together!.
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