### Ingredients You’ll Need
* 1 cup strong brewed coffee or espresso, cooled
* 3 tablespoons sugar (adjust to taste)
* 1 cup heavy whipping cream
* 3 large egg whites (or aquafaba for vegan option)
* 1 teaspoon vanilla extract
* Optional: cocoa powder or grated chocolate for garnish
### How to Make It
1. **Sweeten the Coffee:** In a bowl, mix the cooled coffee with sugar until dissolved.
2. **Whip the Cream:** In a separate bowl, whip the heavy cream and vanilla extract until soft peaks form.
3. **Beat Egg Whites:** In another clean bowl, beat the egg whites until stiff peaks form.
4. **Combine:** Gently fold the sweetened coffee into the whipped cream, then carefully fold in the egg whites until fully incorporated and airy.
5. **Chill:** Spoon the mousse into serving dishes and refrigerate for at least 2 hours to set.
6. **Serve:** Garnish with cocoa powder, chocolate shavings, or a dollop of whipped cream before serving.
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