1/2 cup sugar
1/4 cup unsweetened cocoa powder
Pinch of salt
3 large egg whites
1/8 teaspoon cream of tartar
2 tablespoon powdered sugar
Preheat oven to 300°F. Line 2 heavy large baking sheets with foil or parchment paper. Sift 1/4 cup sugar, cocoa and salt into small bowl. Beat egg whites and cream of tartar in large bowl until soft peaks begin to form. Add remaining 1/4 cup sugar 1/2 tablespoon at a time and beat until medium-firm peaks form. Add cocoa mixture 1 tablespoon at a time and beat until meringue is stiff and glossy.
Drop meringue onto prepared baking sheets by rounded teaspoonfuls, spacing 1 inch apart. For chewy soft cookies, bake meringues 25 minutes. For drier, crisper cookies, bake meringues 40 minutes. Cool cookies on baking sheets. Sift powdered sugar over cookies.