Mix flour, salt, baking soda, sugar, and spices in a large bowl. (You can use 1 tsp of pumpkin pie seasoning instead of the separate spices, if you wish.)
Add wet ingredients to the dry and mix until well combined.
Pour batter into 12 prepared muffin tins.
Bake for 35-40 minutes, or until golden brown and a toothpick comes out clean.