• 3 large eggs, cold and separated
  • 1/2 cup (3 1/2 ounces) fine grain sugar
  • 1/2 cup + 1 tablespoon (3 ounces) all purpose flour
  • 1 tablespoon + 1 teaspoon cornstarch
  • 2 tablespoons + 1 tablespoon unsweetened dark cocoa powder (100% cacao)
1. Place a wire rack in the center of the oven and preheat the oven to 400F. Place the 3 yolks with half the sugar in a large mixing bowl. Using an electric whisk, beat the yolks on high speed for around 6 minutes until they turn pale yellow and creamy. They will expand in volume as air gets incorporated.

2. Place the egg whites with the remaining sugar in a large mixing bowl and whisk with an electric mixer for about 3-4 minutes on high speed until the egg whites form soft peaks. The whites will expand and triple in volume.

3. Sift the flour, cornstarch and cocoa together, three times and keep aside.

4. Fold the eggs whites into the egg yolks using an outward to inward circular motion using a silicone spatula. Do this folding motion 4 times. There is no need to over-mix at this stage. Sift the pre-sifted dry ingredients over the eggs and the using the outward to inward circular motion, fold the ingredients until no visible specks of flour are visible. The mixture will deflate a little as you fold but it should not be completely flat.

5. Line two baking sheets, each with a silicone mat and a sheet of parchment paper. Using a pencil mark the parchment sheet in half and then divide each half into 7 equal sized rectangles. Repeat with the other half. Fill half of the cookie batter into a pastry bag fitted with a large #1 round decorating tip and pipe out one 3 inch long strip of batter in each rectangle. Bake one sheet of cookies at a time in the oven for about 6-8 minutes or until the edges of the cookies are just firm to touch. They should not be browned or they will be overbaked. The cookies bake very fast so keep an eye on them. Repeat with rest of the batter to prepare the remaining cookies. Cool the cookies on the parchment paper before removing and transferring to an airtight container for storage.