Peanut Butter Mousse Brownie Pie Recipe

There are such things that are "too good" for you. When it comes to food and, specifically, dessert, I consider combining chocolate and other rich ingredients to be "too good" for you, or at least for me and my aunt who's diabetic.

But like chocolate chip on chocolate cheesecake (#3 on this list), the peanut butter mousse brownie pie recipe that ran into ( was something I had to try at least once.

Peanut Butter Mousse Brownie Pie

Peanut Butter Mousse Brownie Pie

For the Brownies:
  • 4 oz dark chocolate, chopped
  • 1 stick butter, cut in cubes
  • 1 tbsp instant espresso or coffee (optional)
  • 2 eggs
  • 1 1/2 tsp vanilla
  • 3 fingered pinch of salt
  • 1/2 cup brown sugar (packed)
  • 1/2 cup granulated sugar
  • 1/2 cup all purpose flour
For the Peanut Butter Mousse:
  • 3/4 cup creamy peanut butter, (do NOT use natural or crunchy!)
  • 4 oz cream cheese, at room temperature
  • 1 tsp vanilla
  • 3 tbsp milk
  • 1/2 cup powdered sugar, sifted
  • 2/3 cup heavy whipping cream, very cold

For the Ganache:
  • 1/3 cup heavy cream
  • 1/4 cup semisweet chocolate chips

10 mini Reese's Peanut Butter Cups, roughly chopped

Make the Brownies:
Preheat oven to 350 degrees. Line the bottom of a round 9" cake pan with greased parchment paper. Spray the sides of the pan with cooking spray.

Bring a small pot of water to a boil. Place the chocolate, butter and instant espresso into a non-reactive heat proof bowl. Place bowl w/ ingredients over the boiling water. Stir constantly until the chocolate and butter have completely melted then remove bowl from heat. Cool slightly.

Add the eggs to a mixing bowl. Whisk. Next add the vanilla, salt, sugar and brown sugar to the bowl. Whisk thoroughly. Add the chocolate butter mixture then whisk again. Gently fold in the flour to the brownie batter until just combined. Over mixing will result in tough brownies!

Pour the batter into the prepared cake pan. Place into a preheated 350 degree oven. Bake for 20-25 minutes or until a toothpick inserted 3" from the edge of pan comes out with only a few crumbs. Remove from oven and cool completely on a wire rack, at least 1 hour.

To remove from pan, carefully slide a knife around the edges to loosen. Place a a plate over the brownies then invert the pan. Brownies should easily flip out. Peel off parchement paper.

Make the Mousse:
While the brownies are baking/cooling prepare the mousse.

Place the peanut butter, cream cheese, vanilla and milk into a large mixing bowl. Beat by hand or w/ an electric mixer until smooth and fluffy. Add the powdered sugar. Beat until smooth. Set aside.

Place whipping cream into a separate mixing bowl. Beat until whipped cream holds stiff peaks. This is most easily done using a stand mixer or electric beater but can be done by hand, just be sure that the cream is extremely cold before whipping.

Working in four batches, gently fold the whipped cream into the peanut butter mixture to form a light, airy mousse. Over working the mousse will cause the whipped cream to deflate so use a light hand! Scrap the mousse into a piping bag w/ a large round tip or into a gallon-sized sealable plastic bag. Place the mousse into the fridge to chill for at least 1 hour before piping.

Assemble the pie
Carefully place the brownie onto the plate you wish to serve/store the pie in.

Remove the mousse from the fridge. Cut about 1/4 inch of the bottom corner off of the sealable plastic bad if you don't have a piping bag. The plastic bag will act as your piping bag. Evenly pipe the mousse over the brownie in large spirling cirles beging on the outside and ending in the middle. Use all of the mousse. With a rubber spatula, smooth out and the top surface of the mousse. Place the brownie and mousse into the refrigerator. Chill for at least 30 minutes before finishing.

Make the Ganache
While the layered brownie and mousse are chilling, make the ganache. Place 1/3 cup whipping cream into a small sauce pan over medium-high heat. Bring to a simmer, stirring frequently. Remove from heat and add the chocolate. Let chocolate and cream sit for about 3 minutes. Whisk until smooth and shiny. Leave at room temperature until ready to finish pie.

Finish the pie:
Remove the pie from the fridge. Sprinkle the chopped Reese's cups evenly over the top of the pie. Drizzle with ganache. This pie must be served chilled or the mousse will deflate. Pie may be stored in the fridge for upto 3 days. It freezes well and can also be eaten straight from the freezer. Enjoy!

The recipe and instructions are from I followed the directions closely and it's simple enough. This pie tastes as fantastic as it looks.

One thing for sure though, is that this mousse brownie pie is very rich, both in looks, taste, and I'm quite sure, in calories. Honestly, I only had a slice and delivered the rest to my brother's apartment. It's just too rich for me to eat, but nevertheless, fun to make.