Prepare the brownie layer: Preheat your oven to 350°F (175°C). Line an 8-inch square pan with parchment paper, ensuring there’s some overhang for easy removal later. In a bowl, whisk together the melted butter and sugar until smooth. Add the eggs and vanilla, and mix until fully combined. Sift in the cocoa powder, flour, salt, and baking powder, stirring gently until the batter is smooth. If using, fold in the chocolate chips. Spread the batter evenly into the prepared pan and bake for 18–22 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Allow the brownies to cool completely in the pan before adding the next layer.
Make the caramel peanut layer: In a small bowl, mix the caramel sauce, peanut butter, and a pinch of salt until smooth. Spread this mixture evenly over the cooled brownie layer, creating a smooth, even layer. Place the pan in the fridge while you prepare the mousse.
Make the caramel mousse: In a small bowl, sprinkle the gelatin over the cold water and let it stand for about 5 minutes to bloom. Gently heat the bloomed gelatin in the microwave for a few seconds until dissolved—do not let it boil. In a mixing bowl, beat the cold heavy cream with powdered sugar until soft peaks form. Add the dissolved caramel sauce into the whipped cream mixture and fold until smooth and fully combined, being careful not to deflate the whipped cream.
Assemble the dessert: Carefully pour the caramel mousse over the chilled caramel peanut layer. Smooth the top with a spatula to ensure an even layer. Refrigerate for at least 4 hours, or until the mousse is set and firm.
Serve and Enjoy
Serve the dessert: Once the mousse has fully set, remove the dessert from the pan using the parchment paper overhang. Slice the dessert into squares, and place one square on each plate.
Top and garnish: Drizzle each square with warm chocolate sauce and extra caramel sauce. For added texture and flavor, sprinkle with chopped chocolate, roasted peanuts, and garnish with a truffle, chocolate bonbon, or a small scoop of vanilla ice cream on top. This step adds a luxurious touch to your dessert.
Enjoy: Indulge in the layers of rich chocolate, caramel, and peanut butter, creating a mouthwatering treat that’s as decadent as it is festive!
