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Premium Dark Chocolate Mousse

By America's Test Kitchen

Published on August 21, 2007

Time

30 minutes, plus 2 hours chilling

Yield

Serves 6 to 8 (Makes 3 1/2 cups)

Premium Dark Chocolate Mousse

Ingredients

8 ounces (227 grams) bittersweet chocolate, 62 to 70 percent cacao, chopped fine3 tablespoons granulated sugar 2 tablespoons Cocoa powder, preferably Dutch-processed1 teaspoon instant espresso powder 7 tablespoons water 1 tablespoon brandy 3 large eggs, separated⅛ teaspoon table salt 1 cup heavy cream, plus 2 more tablespoons (chilled)

Before You Begin

This recipe is designed to work with a boutique chocolate that contains a higher percentage of cacao than the Ghirardelli chocolate recommended in our Dark Chocolate Mousse. A handheld mixer can easily do the job of a standing mixer in this recipe, though mixing times may vary slightly. This recipe contains raw or undercooked eggs, which comes with inherent risks. To learn more about food safety, check out this guide.

Instructions

  1. Melt chocolate, 2 tablespoons sugar, cocoa powder, espresso powder, water, and brandy in medium heatproof bowl set over saucepan filled with 1 inch of barely simmering water, stirring frequently until smooth. Remove from heat.
  2. Whisk egg yolks, 1 1/2 teaspoons sugar, and salt in medium bowl until mixture lightens in color and thickens slightly, about 30 seconds. Pour melted chocolate into egg mixture and whisk until thoroughly combined. Let cool until slightly warmer than room temperature, 3 to 5 minutes.
  3. In clean bowl of standing mixer fitted with whisk attachment, beat egg whites at medium-low speed until frothy, 1 to 2 minutes. Add remaining 1 1/2 teaspoons sugar, increase mixer speed to medium-high, and beat until soft peaks form when whisk is lifted, about 1 minute. Detach whisk and bowl from mixer and whisk last few strokes by hand, making sure to scrape any unbeaten whites from bottom of bowl. Using whisk, stir about one-quarter of beaten egg whites into chocolate mixture to lighten it; gently fold in remaining egg whites with rubber spatula until a few white streaks remain.
  4. Whip heavy cream at medium speed until it begins to thicken, about 30 seconds. Increase speed to high and whip until soft peaks form when whisk is lifted, about 15 seconds longer. Using rubber spatula, gently fold whipped cream into mousse until no white streaks remain. Spoon mousse into 6 to 8 individual serving dishes or goblets. Cover with plastic wrap and refrigerate until set and firm, at least 2 hours. (The mousse may be covered and refrigerated for up to 24 hours.)
Premium Dark Chocolate Mousse

Premium Dark Chocolate Mousse

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By America's Test Kitchen
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Time

30 minutes, plus 2 hours chilling

Yield

Serves 6 to 8 (Makes 3 1/2 cups)

Ingredients

8 ounces (227 grams) bittersweet chocolate, 62 to 70 percent cacao, chopped fine
3 tablespoons granulated sugar
2 tablespoons Cocoa powder, preferably Dutch-processed
1 teaspoon instant espresso powder
7 tablespoons water
1 tablespoon brandy
3 large eggs, separated
⅛ teaspoon table salt
1 cup heavy cream, plus 2 more tablespoons (chilled)

Test Kitchen Techniques

Ingredients

8 ounces (227 grams) bittersweet chocolate, 62 to 70 percent cacao, chopped fine
3 tablespoons granulated sugar
2 tablespoons Cocoa powder, preferably Dutch-processed
1 teaspoon instant espresso powder
7 tablespoons water
1 tablespoon brandy
3 large eggs, separated
⅛ teaspoon table salt
1 cup heavy cream, plus 2 more tablespoons (chilled)

Test Kitchen Techniques

Ingredients

8 ounces (227 grams) bittersweet chocolate, 62 to 70 percent cacao, chopped fine
3 tablespoons granulated sugar
2 tablespoons Cocoa powder, preferably Dutch-processed
1 teaspoon instant espresso powder
7 tablespoons water
1 tablespoon brandy
3 large eggs, separated
⅛ teaspoon table salt
1 cup heavy cream, plus 2 more tablespoons (chilled)

Test Kitchen Techniques

Why This Recipe Works

For a dark chocolate mousse recipe that would be balanced and light, we eliminated the butter and reduced the number of egg whites and yolks. We whipped the cream to soft peaks before adding it to the chocolate to make up for some of the lost volume caused by these reductions. To maximize the chocolate flavor in our mousse recipe, we used a combination of 8 ounces of bittersweet chocolate and 2 tablespoons of cocoa powder, and added water to rescue our mousse from the weight of the chocolate and to restore its airy texture.

Before You Begin

This recipe is designed to work with a boutique chocolate that contains a higher percentage of cacao than the Ghirardelli chocolate recommended in our Dark Chocolate Mousse. A handheld mixer can easily do the job of a standing mixer in this recipe, though mixing times may vary slightly. This recipe contains raw or undercooked eggs, which comes with inherent risks. To learn more about food safety, check out this guide.

Instructions

  1. Melt chocolate, 2 tablespoons sugar, cocoa powder, espresso powder, water, and brandy in medium heatproof bowl set over saucepan filled with 1 inch of barely simmering water, stirring frequently until smooth. Remove from heat.
  2. Whisk egg yolks, 1 1/2 teaspoons sugar, and salt in medium bowl until mixture lightens in color and thickens slightly, about 30 seconds. Pour melted chocolate into egg mixture and whisk until thoroughly combined. Let cool until slightly warmer than room temperature, 3 to 5 minutes.
  3. In clean bowl of standing mixer fitted with whisk attachment, beat egg whites at medium-low speed until frothy, 1 to 2 minutes. Add remaining 1 1/2 teaspoons sugar, increase mixer speed to medium-high, and beat until soft peaks form when whisk is lifted, about 1 minute. Detach whisk and bowl from mixer and whisk last few strokes by hand, making sure to scrape any unbeaten whites from bottom of bowl. Using whisk, stir about one-quarter of beaten egg whites into chocolate mixture to lighten it; gently fold in remaining egg whites with rubber spatula until a few white streaks remain.
  4. Whip heavy cream at medium speed until it begins to thicken, about 30 seconds. Increase speed to high and whip until soft peaks form when whisk is lifted, about 15 seconds longer. Using rubber spatula, gently fold whipped cream into mousse until no white streaks remain. Spoon mousse into 6 to 8 individual serving dishes or goblets. Cover with plastic wrap and refrigerate until set and firm, at least 2 hours. (The mousse may be covered and refrigerated for up to 24 hours.)

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