Preheat your oven to 250 °F.
Line 2-3 large-sized cookie sheets withparchment paper.
In a large-sized glass bowl, add egg whitesand set aside at room temperature for about 30 minutes.
In the bowl of egg whites, vanilla extractcream of tartar and salt and with anelectric mixer, beat on medium speed until frothy.
Slowly, add sugar and whisk until blendedthoroughly.
Now, beat on high speed until stiff glossypeaks form.
Transfer the whipped egg white mixture into apastry bag, fitted with a large round tip.
Pipe swirls onto the prepared cookie sheetsabout 2-inch apart.
Bake for approximately 40-45 minutes.
Turn off the oven but leave the cookie sheetsin the oven for about 1 hour (Let the oven door close).
Remove the cookie sheets from oven and placeonto the wire racks to cool completely.