To get a soft, chewy and moist cookie, the key is to under-bake the cookie dough. Under-baking doesn't mean the cookies aren't done. It just ensures that the cookies stay moist and chewy. Once the cookies begin to brown at the edges, remove them from the oven. I took 12 minutes with each batch I baked on the middle rack in the oven. It may be more or less with your oven. Do note that the cookies will be very soft and fragile when pulled out from the oven so let the cookies cool on the baking sheet for 10 minutes. Once they're firm enough to handle, transfer to a wire rack to cool.