Gently pour the almond mixture over the whipped egg whites so they don’t deflate. Using a rubber spatula, gently fold the almond flour mixture into the egg whites until the mixture holds a 10 count, meaning when batter falls from the spatula to the bowl it takes about 10 seconds until it fully blends into the rest of the bowl in the batter. This way, the almond mixture is fully hydrated but egg whites still retain some air. The mixture is thick enough to pipe without running everywhere, but the peak at the top of each piped cookie will fall on its own, making a perfectly smooth cookie. This takes about 45 turns, but depending on how aggressively you fold, it can be more or less.