*Gluten-free: substitute half buckwheat flour and half brown rice flour for the spelt flour. Or you can use GF oat flour, too, such as part oat flour, part buckwheat flour and part brown rice flour.
**No buttermilk? Sub half unsweetened yogurt and half whole milk. Or use milk or an alternative milk and add 2 Tablespoons apple cider vinegar or white vinegar.