Ingredients

3 cups confectioners' sugar 

3/4 cup Dutch-process cocoa powder 

1/2 teaspoon coarse salt 

5 ounces bittersweet chocolate, chopped 

1 1/2 cups chopped salted macadamia nuts 

4 large egg whites, room temperature 

Preparation

Preheat oven to 325 degrees. Whisk together confectioners’ sugar, cocoa, and salt. Stir in chocolate and nuts. Add egg whites; stir until just incorporated.

Drop dough by 1/4 cupfuls, 3 inches apart, onto 2 parchment-lined rimmed baking sheets. Bake until cookie tops are dry and crackled, 22 to 25 minutes, rotating sheets halfway through. Transfer baking sheets to wire racks; let cookies cool completely.