1-Preparation: Before beginning, make sure your equipment is completely clean and free of any grease or residue, which can prevent the egg whites from reaching their full volume. Separate the eggs carefully, ensuring no yolk gets into the whites. Even a tiny amount of yolk can compromise the final result. Allow the egg whites to come to room temperature, which helps them achieve greater volume when whipped.

2-First Step: Preheat the Oven: Preheat your oven to 225°F (110°C). Line two baking sheets with parchment paper or silicone baking mats. Prepare a piping bag fitted with your choice of tip (a star tip creates pretty patterns, or simply cut a small opening in the bag for round cookies).

3-Second Step: Beat the Egg Whites: Place the egg whites in a clean, dry mixing bowl. Using an electric mixer on medium speed, beat the egg whites until they become frothy. Add the cream of tartar and continue beating until soft peaks form. The peaks should curl over when the beaters are lifted.

4-Third Step: Add Sugar Gradually: Increase the mixer speed to medium-high. Add the sugar one tablespoon at a time, allowing each addition to fully incorporate before adding the next. Continue beating until the sugar has completely dissolved. To test this, rub a small amount of the meringue between your fingers it should feel smooth, not gritty.

5-Fourth Step: Add Flavorings: Add the vanilla extract and salt. Beat on high speed until stiff, glossy peaks form. The meringue should stand up straight when the beaters are lifted, and the mixture should have a glossy, satin-like appearance.

6-Creating Different Shapes and Sizes: For traditional cookies, transfer the meringue to your prepared piping bag. Pipe the meringue onto the baking sheets in your desired shape and size, spacing them about an inch apart. For kisses, pipe small mounds about 1-2 inches in diameter. For nests, pipe a circle with slightly higher edges, then fill the center with the remaining meringue. For a rustic approach, you can also simply drop spoonfuls of the meringue onto the baking sheets. This method creates charming, cloud-like cookies with a more homespun appearance.

7-Final Step: Bake and Cool: Place the baking sheets in the preheated oven. Bake for 1.5 to 2 hours, or until the meringues are dry to the touch and easily lift off the parchment paper. They should be crisp throughout, not just on the outside. Turn off the oven and leave the meringues inside to cool completely, preferably overnight. This gradual cooling helps prevent cracking and ensures a perfectly crisp texture. Once cooled, store the meringues in an airtight container until ready to serve.