whites in one bowl and half the whites in another Cover each bowl with plastic wrap, then poke several holes in the plastic wrap in order to allow the water in the egg whites to evaporate, or cover with cheesecloth Allow the egg whites to age and dry at room temperature overnight or in the refrigerator for 48 hours Weigh out 95 grams of aged egg whites from each batch and keep separate DAY 3 When you are ready to mix the batter, place the almond flour and confectioners’ sugar in a food processor fitted with the steel blade and run it for 10 seconds Transfer to a large mixing bowl and stir together with a wooden or stiff plastic spatula Place the first 95 grams of egg whites in the bowl next to it and set aside Make an Italian meringue Wash the bowl of your stand mixer thoroughly with hot water and soap, and dry with a clean kitchen towel Begin whipping the second 95 grams of egg whites on the lowest speed Doublecheck the temperature of the egg whites by feeling the bottom of the bowl If it is at all cold, fill a sink with 1 inch of hot water Stop the machine, unlock the bowl, and place it in the hot water for 1 full minute while mixing by hand with the whip attachment or a whisk Remove the bowl from the water and wipe dry Feel the temperature with your hand; it should feel neither cold nor hot Return the bowl to the mixer and resume whipping on low speed Meanwhile, place the water in the small ... whipping the second 95 grams of egg whites on the lowest speed Doublecheck the temperature of the egg whites by feeling the bottom of the bowl If it is at all cold, fill a sink with 1 inch of hot water... Stop the machine, unlock the bowl, and place it in the hot water for 1 full minute while mixing by hand with the whip attachment or a whisk Remove the bowl from the water and wipe dry Feel the temperature with... to a large mixing bowl and stir together with a wooden or stiff plastic spatula Place the first 95 grams of egg whites in the bowl next to it and set aside Make an Italian meringue Wash the bowl of your stand mixer