In a large bowl combine the bran, flour, sugar, cinnamon, baking powder, baking soda, salt and raisins. Stir all together well to mix. Add the pumpkin, eggs, oil and yogurt. Stir the mixture until it is just combined.
Spoon the batter into 12 paper-lined or non-stick muffin tins. Bake at 400ºF (200 ºC) for 25 minutes or until the muffins are firm to the touch or a toothpick inserted into the middle of a muffin comes out clean.
Notes
Use pure pumpkin puree in this recipe, not pumpkin pie mix. Canned pumpkin pie filling has other ingredients added to it and will change the flavor of the end product. The pumpkin puree is simply the vegetable.