Sift the flour into a large bowl.
Turn the dough out onto lightly floured surface; knead until smooth and elastic, about 5 minutes.
Cover the dough and let rest for at least 30 minutes.
Knead the dough briefly, then cut in half. Turn out onto a lightly floured surface.Roll each half into a cylinder. Lightly score so that you have 12 equal pieces. Roll each piece out into a 3 1/2-inch square.
Stack the wrappers while you are preparing the remainder, covering with a damp cloth so that they don't dry out. If necessary, lightly dust the wrappers with flour or cornstarch to prevent them from sticking together.
Use immediately, or refrigerate or freeze in a plastic bag until ready to use.