Preheat oven to 400 F
Spray muffin tins with nonstick cooking spray or line with greased muffin baking cups
In a large mixing bowl, combine flour, baking soda, all spice, cinnamon and salt
In another large bowl, combine eggs and sugar and beat well
Add pumpkin and oil into egg mixture and stir well
Gradually stir in the dry ingredients until batter thickens and is well combined
Fold in cranberries
Pour batter into muffin tins and bake for 20-22 minutes, or until toothpick inserted in the middle comes out clean.
Serve warm with butter and enjoy!
Makes roughly 16-20 muffins