Preheat oven to 350 F. Line 2 cookie sheets with parchment paper. Grease them very well. (Since there is no butter or oil in these cookies, they will stick without greasing the sheets well)
Combine almond meal, sugar and cocoa powder in a bowl and mix well.
Using an electric mixer, beat the egg whites until stiff peaks form.
Using a rubber spatula fold into the dry mixture until just combined.
Drop two tablespoons for each cookie on the cookie sheet and bake for 15 minutes.
Let cool completely before removing from the cookie sheet.