Preheat oven to 350 degrees F.
In a large bowl, cream together butter and sugar.
Mix in extracts and eggs.
In a separate bowl, mix together flour, salt, and cornstarch then slowly add to the larger bowl of wet ingredients, the dough will be thick.
In small batches, roll the dough on a floured surface to ¼ inch thickness and cut shapes using cookies cutters.
Line your cookie sheet with a silicone mat or parchment paper and bake cookies for 6-8 minutes. The cookies will be soft, but not gooey. Let them cool on the cookie sheet for about 5 minutes to firm up before transferring to a wired rack for final cooling.