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Peanut Butter Mousse Bars

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  • Author: Olivia
  • Prep Time: 25 minutes
  • Cook Time: 0 minutes
  • Total Time: 4 hours 25 minutes
  • Yield: 912 bars 1x
  • Category: Dessert
  • Method: No-Bake
  • Cuisine: American
  • Diet: Vegetarian

Description

Peanut Butter Mousse Bars are a rich, no-bake dessert featuring a buttery graham cracker crust topped with fluffy peanut butter mousse and optional garnishes like whipped cream or chocolate—perfect for peanut butter lovers.


Ingredients

Units Scale
  • 1 1/2 cups graham cracker crumbs
  • 1/2 cup unsalted butter, melted
  • 1 cup creamy peanut butter
  • 8 oz cream cheese, softened
  • 3/4 cup powdered sugar
  • 1 teaspoon vanilla extract
  • 1 cup heavy whipping cream
  • Whipped cream (for topping, optional)
  • Chopped peanuts or mini chocolate chips (optional for garnish)

Instructions

  1. Mix graham cracker crumbs with melted butter until combined. Press into a parchment-lined 8×8 or 9×9-inch baking dish to form an even crust. Chill while preparing the mousse.
  2. In a large bowl, beat peanut butter and cream cheese together until smooth and creamy.
  3. Add powdered sugar and vanilla extract. Beat until well combined.
  4. In a separate bowl, whip the heavy cream until stiff peaks form.
  5. Gently fold the whipped cream into the peanut butter mixture until smooth and fluffy.
  6. Spread the mousse evenly over the chilled crust.
  7. Refrigerate for at least 4 hours or until set.
  8. Top with whipped cream, chopped peanuts, or mini chocolate chips before slicing and serving.

Notes

  • Use natural peanut butter only if it is well-stirred and smooth.
  • A chocolate ganache layer adds a decadent peanut butter cup vibe.
  • Bars can be made a day in advance—ideal for entertaining.
  • To serve clean slices, use a sharp knife wiped clean between cuts.
  • Store chilled in an airtight container for up to 5 days.

Nutrition

  • Serving Size: 1 bar
  • Calories: 340
  • Sugar: 16g
  • Sodium: 180mg
  • Fat: 26g
  • Saturated Fat: 12g
  • Unsaturated Fat: 12g
  • Trans Fat: 0g
  • Carbohydrates: 20g
  • Fiber: 2g
  • Protein: 6g
  • Cholesterol: 45mg