4.67 from 3 votes

Chocolate Mousse Bars with Feuilletine Crunch

Chocolate Mousse Bars with Feuilletine Crunch | Photo by Zoë François

I made these chocolate mousse bars for an Oscars party. They are simple to make (no baking required), but fancy enough to eat while watching the red carpet glitter or for any other occasion. 

Chocolate Mousse Bars with Feuilletine Crunch | Photo by Zoë François

Check out these other mousse recipes, like triple chocolate mousse cake, chocolate mousse with toasted meringue, and lemon-lime mousse with fresh strawberries!

Chocolate Mousse Bars with Feuilletine Crunch

Chocolate Mousse Bars with Feuilletine Crunch

Looking for a simple but absolutely delicious chocolate bar for a party? These Chocolate Mousse Bars with Feuilletine Crunch are rich and chocolatey with a wonderful crunch on top.
4.67 from 3 votes


Feuilletine Base

Chocolate Peanut Butter Mousse

  • 6 oz milk chocolate chopped
  • 2 oz creamy peanut butter natural will be too grainy (see note)
  • 1 cup heavy whipping cream
  • 1 tsp vanilla extract

Ganache Topping

  • 8 oz bittersweet chocolate chopped
  • 1 ¼ cup heavy cream
  • chopped salted peanuts for topping


To Make The Bars

To Make the Base

  • Over a double boiler, gently melt the chocolate. Once it's melted, turn off the heat and stir in the nutella until it is smooth. Add the Feuilletine and fold it into the chocolate. Pour the warm mixture into the prepared pan. Cover it with plastic wrap and press the mixture firmly into the pan. Leave the plastic on the base and refrigerate it while you make the mousse.

To Make The Mousse

  • Melt the chocolate and peanut butter over a double boiler. Cool to room temperature.
  • Whip the heavy cream and vanilla to soft peaks. It should droop on the whip when lifted out of the bowl, but not fall off.
  • Fold 1/3 of the cream into the melted milk chocolate. It is okay if there are still some white streaks. Add the next 1/3 of the cream to the chocolate mixture and gently fold it together. Add the rest of the cream and fold together. Pour the mousse over the chilled base and smooth it out with an offset spatula. Refrigerate, uncovered.

To Make The Ganache

  • In a saucepan, heat the cream over low heat until it starts to simmer. Add the chopped chocolate and swirl the pan until the chocolate is submerged. Let it sit for 3 minutes and then gently stir it together with a rubber spatula, until smooth. Let it sit to room temperature.
  • Pour the room temperature ganache over the chilled mousse and shimmy the pan to cover the mousse completely and evenly. You can use an offset spatula if it isn’t spreading evenly by just tilting the pan. Cover with the chopped peanuts and refrigerate for at least 2 hours. This can be made a day or two ahead.
  • To cut the bars, run a hot knife around the edge of the pan. If you have a mold, just lift it off, if you used a square cake pan you will need to invert the bars. To invert them, you’ll want to very quickly wave the pan over the stove, just for a few seconds (not long enough to melt the base), cover the top with parchment and invert onto something flat, then invert it onto a cutting board.
  • Use a very thin knife, dipped into hot water to cut the bars into whatever size or shape you’d like.


Peanut Butter: Skippy or Jif is best here. The natural one you get at the co-op is too grainy. This is optional, just leave it out if you’d rather.
Tried this recipe?Let us know how it was!

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14 thoughts to “Chocolate Mousse Bars with Feuilletine Crunch”

  1. I did it! Got this made finally- had to wait for the right occasion.
    And OMG! Such decadence- really over the top. Your instructions were perfect. Each layer was so perfect and my new favorite ingredient-feuilletine flakes! Now that I have some- I need some ideas on what else to do with them? Thank you for such a fun recipe Zoe!

  2. This is delicious. Feuilletine is the bomb and not hard to make from scratch. The peanut butter layer was pretty soft though. Is that unique to me somehow or is there a secret to having something with a bit more structure?

  3. Hello Zoe,
    I just bought your GF Artisan Bread book. However when I saw that the recipes calls for xantham gum / psyllium husk I was saddened. I am allergic to those kind of ingredients. Will I be able to use chia seeds instead? If so, how much chia seeds should I use?

  4. 4 stars
    The components were delicious and feuilletine in the base of slices is DEFINITELY going to happen again for me.

    I did find the ganache was a bit too thick and took over the flavour of the delicious peanut butter mousse so next time will reduce the ganache by 1/3 and increase the mousse by the same.

    Thanks I really enjoyed this upscale chocolate slice!

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