This is Martha Stewart's recipe. These are really good and easy to make.
1/2 cup (1 stick) unsalted butter, softened
1/2 cup sugar
1 teaspoon pure vanilla extract
1 large egg white
1/2 teaspoon coarse salt
1 1/2 cups all-purpose flour
2 tablespoons all-purpose flour
Preheat oven to 350 degrees.
Bake, rotating halfway through, until cookies just begin to turn golden, 13 to 15 minutes. Let cool on parchment on wire racks.
Mix butter and sugar in a bowl on medium. Mix in vanilla and egg white. Reduce speed to low. Add salt and flour and mix.
Roll dough into 3/4-inch balls. Roll each ball into a 6-inch log.
Bend log in half, then twist. Space 1 inch apart on baking sheets lined with parchment paper.
Bake, rotating halfway through, until cookies just begin to turn golden, 13 to 15 minutes. Let cool on parchment on wire racks.
Enjoy!