I used whole wheat pastry flour in place of oat flour. (chefambershea.com)
You can also use whole wheat pastry flour in place of the oat flour. (reciperebuild.com)
• If you don't have a food processor or just don't feel like making oat flour, I've also made these with about 3/4 cup of spelt flour in place of the oat flour when I've been low on oats. (occasionallyeggs.com)