Preheat oven to 400 degrees F.
Mill your Einkorn berries or add your Einkorn flour to a large mixing bowl.
Add salt, baking powder, baking soda, salt, cinnamon, and millet. Mix well.
In a separate bowl add buttermilk or milk kefir, egg, olive oil, maple syrup, honey, and vanilla. Mix well.
Add wet ingredients to dry ingredients and mix well.
Add walnuts if using.
In a prepared 12 cup muffin tin, divide the batter between the 12 cups.
Bake for 15 minutes.
Transfer the muffins to a cooling rack.