Preheat oven to 425 Degrees F. In a large bowl, whisk together  1 1/3 Cup all-purpose flour 1 tsp. baking powder 1 tsp. baking soda 1/2 tsp. salt 2 tsp. ground cinnamon 1 tsp.pumpkin pie spice

In a medium bowl, whisk together 1/2 Cup brown sugar 2 large eggs Then add 1 Cup sourdough starter 1 Cup pumpkin puree 1/2 Cup melted coconut oil 1/2 Cup milk 1 tsp. vanilla extract 1/2 Cup chopped walnuts Mix everything well

Pour the batter carefully into either greased or cupcake papered muffin tins Bake the muffins for 5 minutes at 425 degrees F  Keeping the muffins in the oven, lower the temperature down to 350 and bake for an additional 10 minutes or until a toothpick inserted in the center comes out clean