Preheat your oven to 325°F (160°C) and line a large baking sheet with parchment paper.
Zest the lemons to get about 2 tablespoons and massage the zest into 200 grams of granulated sugar.
Sift together 270 grams of almond flour with the lemon-infused sugar mixture in a larger bowl.
Whip 3 large egg whites with 1/4 teaspoon of fine sea salt until stiff peaks form.
Gently fold in 1 1/2 teaspoons of pure almond extract and 3 tablespoons of limoncello into the whipped egg whites, then gradually incorporate the almond flour mixture.
Continue folding in the remaining almond flour mixture until the batter is thick and slightly sticky.
Scoop out dough using a cookie scoop, roll in granulated sugar, then powdered sugar, and place on the prepared baking sheet.