Preheat the oven to 375 degrees F.
Sift together ¾ cup (150 grams) of granulated sugar, flour, and salt twice and set it aside.
In a large bowl, beat the egg whites on low speed with a stand mixer fitted with the whisk attachment until frothy.
Add the cream of tartar and vanilla and increase the speed to medium.
Add the remaining ¾ cup (150 grams) of sugar, 1 tablespoon at a time. Increase the speed to medium-high and beat the eggs until stiff peaks form.
Sift the flour mixture ¼ cup at a time into the egg whites, gently folding to combine between each addition.
Pour the batter into an ungreased tube pan and spread it into an even layer with a rubber spatula. Bang the pan on the counter 3-4 times to remove any air bubbles.
Bake the cake for 25-32 minutes, or until a toothpick inserted into the center of the cake comes out clean.
Turn the cake upside down and allow to cool. If your tube pan has small feet, you can turn the pan over directly onto a heat-proof surface. If your cake pan does not have feet, you can turn it onto a cooling rack.
Allow the cake to cool completely, around an hour, before turning the pan.
Run a small offset spatula or knife around the side of the pan to gently release the cake from the pan.
Turn the cake out onto a serving platter and enjoy.