A combination of all-purpose flour and cornstarch is a common substitute for pastry flour. For this recipe you will need 1 3/4 cup all-purpose flour and 1/4 cup cornstarch in place of the 2 cups of pastry flour. Swedish Ginger Cookies made with this pastry flour substitute will indeed be soft and tender, but they will not have that thin, crispy-chewy quality of the original. They are still delicious, but they will be slightly thicker and have a more chewy texture throughout than the pastry flour version.