Bittersweet Chocolate Mousse With Fleur de Sel

Updated Feb. 28, 2024

Bittersweet Chocolate Mousse With Fleur de Sel
David Malosh for The New York Times. Food Stylist: Simon Andrews.
Total Time
10 minutes
Rating
4(2,966)
Comments
Read comments

This is an intense, creamy one-ingredient chocolate mousse adapted from the molecular gastronomist Hervé This. The nearly instant recipe contains no cream or eggs, so a complex chocolate can shine. The mousse serves four, and it can be doubled. But even if you’re serving two, don’t be tempted to halve it. More of our favorite Valentine's Day recipes can be found here.

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Ingredients

Yield:4 servings
  • 285grams bittersweet chocolate (about 10 ounces), roughly chopped, more as needed (see note)
  • Fleur de Sel, to taste
Ingredient Substitution Guide
Nutritional analysis per serving (4 servings)

340 calories; 21 grams fat; 13 grams saturated fat; 0 grams trans fat; 7 grams monounsaturated fat; 1 gram polyunsaturated fat; 45 grams carbohydrates; 4 grams dietary fiber; 39 grams sugars; 3 grams protein; 165 milligrams sodium

Note: The information shown is Edamam’s estimate based on available ingredients and preparation. It should not be considered a substitute for a professional nutritionist’s advice.

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Preparation

  1. Step 1

    Create an ice bath in a large bowl using ice and a little cold water. Nestle a smaller bowl in ice bath.

  2. Step 2

    Place chocolate and 1 cup water in a small pot and heat over medium. Whisk until mixture is melted and smooth, about 3 to 5 minutes.

  3. Step 3

    Immediately pour melted chocolate into the bowl in the ice bath. Vigorously whisk chocolate mixture by hand until thick, 3 to 5 minutes. The chocolate should be fluffy and form a mound when dolloped with the whisk (it should generally have the texture and appearance of mousse). If the mixture does not thicken, add a bit more chopped chocolate and remelt over the heat. Spoon into serving bowls and garnish with fleur de sel.

Tip
  • For a lighter mousse, use 265 grams of bittersweet chocolate or just add more water.

Ratings

4 out of 5
2,966 user ratings
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Comments

I've discovered you can substitute booze for water. Wine is great, anything more than ~40 proof [creme de menthe, rum] is best cut maybe 50% with water or it's a little harsh.

I microwave the chocolate [travesty, I know] for a minute, stir 'til completely melted, then whisk in booze before putting it over the ice bath.

You're welcome.

Super easy, super rich. Followed the recipe to a T.

The mousse held up quite a while too, so I was able to make this way ahead of time, and just scooped it into pretty glasses.

I didn't have the arm strength to whisk by hand so cheated and used a hand mixer. :)

Everyone liked it, but it got a little....cloying/intense after a while, so I added a bit of high quality olive oil, which made it taste even more amazing.

These are the proportions I use (from the italian edition of Scientific American magazine, they have a nice blog from a chemist who loves cooking) 100 g chocolate 70% cocoa paste 115 g water The correct proportion fat/water (it is this proportion that makes possible to form a stable mousse) is this: 34% of fats over 100% of water. Fats percentage can be checked on the nutrition facts label of you chocolate bar.

Not to be hypercritical of what appears to be a fantastic cheat but, the end results are something not to be desired. My take: there are no shortcuts in making sublime chocolate mousse. You can however make a supremely adequate lackluster dessert this way. I also discovered that the "mousse" will seize up when refrigerated . . . of course you can bring it back with a touch of hot water and more whisking which makes this technique awful finicky.

Mine never solidified, and I didn’t have any extra chocolate to add! So next time, I will use less water and add as needed. Tasted great, though.

Complete fail. Either my chocolate to water ratio was off, or my ice bath wasn’t cold enough — but it never thickened. I tried everything: hand whisking for over 5 minutes, adding more melted chocolate. Out of desperation, I pulled out an electric mixer. I even stuck it in the freezer for 10 minutes and tried whisking again. The whole ordeal was probably over 30 minutes and a lot of unnecessary stress for such a “simple” dessert. As a save/surrender, I put it in the freezer for an hour to harden. At least it was edible by spoon. It is rich, like others noted.

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