Preheat the oven to 200°F

For the meringue:

1. Mix the egg whites and sugar with a whisk and place the sugar mixture in a double boiler, heating gently while mixing.

2. When the sugar is dissolved in the egg whites, transfer everything to the mixer.

3. At medium speed, whip the meringue with the whisk until the mixer bowl has cooled or the meringue forms firm peaks.

4. Add cocoa and mix with a serving spoon. Place spoonfuls of meringue, spaced apart.

5. Bake for at least 2 hours or until the meringues are dry, then let cool to room temperature.