Belula

Easy No Bake Dark Chocolate Mousse Pie with Oreo Crust

This easy no bake dark chocolate mousse is simple and quick to make. Made with an Oreo crust, a generous layer a 3-ingredient chocolate mousse topped with chocolate ganache.

Belula October 16, 2020 January 01, 0001
45° shot of the sliced chocolate mousse cake on a marble serving platter

If you are looking for an easy and impressive chocolate mousse dessert, search no more. You have found it. This easy no bake chocolate mousse pie is all I have ever dreamed off: almost effortless and it still looks like you have spent hours making it! It is made with a base of Oreo crust, a layer of 3-ingredient dark chocolate mousse and topped with a silky ganache frosting. The best dark chocolate mousse pie ever! Chocolate fan over here, and if you are like me, you will love this.

Material & Ingredient Notes

Very few ingredients and utensils are necessary:

  • Oreo cookies. You can use store bought or you can make your own. You can find a great recipe here Homemade Oreos (only make the chocolate cookies, not the filling!).
  • Melted butter.
  • Dark Chocolate: use a good quality one, it will make all the difference. I use Valrhona chocolate and I love it.
  • Heavy Cream. Make sure it has all the fat, no skimmed cream or fat free.
  • Milk. Also, no skimmed milk please.
  • A 20 cm / 8-inch tart mould. I like this one.
  • A food processor to pulse the cookies for. You can do this using a bag and a rolling pin if you don't have one 😉.
  • A mixer or a strong arm and a whisk for whisking the cream!
Overhead closeup shot of 2 hands holding the chocolate mousse pie in the pie tin
90° closeup shot as seen from the front of one slice of chocolate mousse pie

How to make this recipe: step by step instructions

To make this recipe there are three main components you need:

  • Oreo cookie crust
  • Dark chocolate mousse
  • Chocolate ganache

First you need to make the Oreo pie crust by combining the cookie crumbs and the melted butter in a small bowl. Pour into a greased 20 cm tart mould, then press into an even layer along the bottom, reaching up to the sides until they are completely covered. Refrigerate while you make the mousse.

Once the crust is ready, make the chocolate mousse (detailed explanation in the next question 😉) and then fill the pie with it. Spread evenly using an offset spatula or the back of a spoon. Refrigerate until the mousse has set and is chilled. About 4 hours.

Once the mousse has set, make the chocolate ganache, and top the chocolate mousse pie with it. Sprinkle some crushed Oreos over it. Let the ganache set in the refrigerator for 1 hour before serving.

Overhead shot of the pie tin lined with the oreo pie crust
2 hand pouring the chocolate mousse over the oreo pie crust
Overhead shot of the chocolate mousse inside the pie crust
Overhead shot of one hand spreading the chocolate mousse using a spoon
Overhead shot of the chocolate mousse pie filled with the chocolate mousse ready to be refrigerated
Overhead shot of the chocolate mousse pie filled with the chilled mousse
Overhead shot of 2 hands pouring the chocolate ganache over the tart
Overhead shot of one hand spreading the chocolate ganache using a spoon
Overhead shot of one hand sprinkling crushed oreos over the chocolate mousse pie

How to make the 3-ingredient chocolate mousse: step by step instructions

  • Whip the cream until it holds stiff peaks. Keep in the refrigerator until needed. Beware: don't over whisk the heavy cream. We are looking for a smooth consistency. Pro tip: refrigerate both the cream and the bowl you will be whisking the cream. Cream must be very cold to properly gain volume and hold up.
  • Make a ganache using the milk and the chocolate: bring the milk to simmer and pour over the chocolate. Let it sit for a few minutes. Using a whisk start mixing from the center and as the chocolate and milk emulsify move towards the side of the bowl. Let it sit at room temperature for 5 minutes.
  • Fold in the whipped cream (in 2 additions) into the chocolate ganache.
  • Fill the tart tin with the mousse and spread evenly.
  • Refrigerate until the mousse has set and chilled.
Overhead shot of a bowl holding the chocolate ganache and the whipped cream
Overhead shot of 2 hands folding in the whipped cream into the chocolate ganache

Recipe notes

  • Chocolate mouse must be prepared once the crust has been made and it is ready to be filled.
  • It must set and cool inside the tart shell.
  • The whipped cream must be folded into the chocolate ganache once it has cooled down a little but has not started to set. Ideal temperature is 27/30 C°- 80/86 F.
  • This pie must be enjoyed chilled! Chocolate mousse cannot be left out. It needs to always be refrigerated.

Expert notes

  • When making mousse (and cake batter, and creams, and many things in pastry), ideally, we want to mix 2 elements that have similar textures. Therefore, we add the whipped cream into the chocolate ganache in 2 additions and not all at once.
  • First add in 1/3 of the whipped cream to loosen up the ganache and make it more similar in texture to the whipped cream.
  • Once it has been fully incorporated, you can fold in the remaining 2/3 of the cream, gently and lovingly!
Overhead shot of the sliced chocolate mousse pie surrounded by white plates and pieces of chocolate
90° closeup shot as seen from the side of one slice of chocolate mousse pie

Storage tips

This chocolate tart lasts for 3 to 4 days in the refrigerator. If it lasts this long 😉.

Freezer instructions

You can freeze this dessert. I would recommend freezing it without the chocolate ganache frosting.

As soon as you have filled your pie tin with the chocolate mousse, cover it and freeze for up to 1 month.

To defrost: let it sit in the refrigerator overnight. Top with the chocolate ganache and enjoy.

Variations to this recipe

  • Chocolate ganache can be replaced by meringue frosting. You can do a simple swiss meringue, and you can find all the step-by-step instructions and troubleshooting here.
  • You can also replace the Oreo crust by any other chocolate cookie crust or by this homemade shortbread crust.
  • You can make this into a white chocolate mousse pie by simply swapping the chocolate mousse by this simple white chocolate mousse recipe.
45° shot of the sliced chocolate mousse cake on a marble serving platter with a slice on a plate at the back
Overhead shot of one hand holding a white plate with a slice of chocolate mousse pie
The ingredients used in all recipes on this site are measured using the metric system. I use a scale to be precise with my measurements and ensure good results. If you would also like to use a scale, here are some: USA, Canada, UK, Australia, France.
Prep Time: 30 minutes
Cook Time: 0 minutes
Total Time: 4 hours 30 minutes

Servings: 8 servings
Nutrition: 354 cal
Cuisine: French

Ingredients

Oreo Crust

  • Oreo 145 g
  • Butter 60 g

Chocolate Mousse Filing

  • Milk 80 g
  • Dark Chocolate 120 g
  • Heavy Cream 200 g

Chocolate Ganache

  • Dark Chocolate 50 g
  • Heavy Cream 80 g
  • Butter 10 g

Procedure

  • 1. Make the Oreo crust: Pulse de cookies (without the filling) in a food processor until they have obtained a breadcrumb consistency. You can do this using a rolling pin too. Combine the cookie crumbs and the melted butter in a small bowl. Pour into a greased 20 cm pie/tart tin, then press into an even layer along the bottom, reaching up to the sides until they are completely covered. Refrigerate while you make the mousse.
  • 2. Make the dark Chocolate Mousse Pie Filling: Whip the cream until it holds stiff peaks. Refrigerate until you are ready to use it. Bring the milk to a boil and pour over the dark chocolate chunks. Let it sit for a few minutes. Using a whisk start mixing from the center and as the chocolate and milk emulsify move towards the side of the bowl. Let it sit at room temperature for 5 minutes. Fold in the whipped cream (in 2 additions). Fill the Oreo pie crust with the chocolate mousse. Spread evenly using an offset spatula or the back of a spoon. Refrigerate until the mousse has set. About 4 hours.
  • 3. Make the Chocolate Ganache: Bring the cream to a boil and pour over the dark chocolate chunks. Let it sit for a few minutes. Using a whisk start mixing from the center and as the chocolate and milk emulsify move towards the side of the bowl. Whisk in the cold butter.
  • 4. Glaze the no bake chocolate mousse pie: Pour the ganache over the cold chocolate mousse pie. Spread evenly by moving the tin in circular directions using both hands, or by using the back of a spoon. Sprinkle with crushed Oreo cookies and let it set for 1 hour in the refrigerator.
If you made this recipe I would really appreciate it if you leave a rating or comment below! Also, if you share on social media please use #cookwithbelula, I would love to see what you create!
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2 Comments
Sol November 01, 2020
Delfina November 18, 2020

Love it. Everyone at home did!!!
Gracias Belula!!

Belén Gowland
Belula November 19, 2020

Hi Delfi! So glad to hear everyone loved the chocolate mousse pie 😍
Thank you for making one of my recipes!

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