Step 1

Preheat oven to 350 degrees F. Line two 12-cup muffin tins with paper liners. Set aside.

Step 2

In a large bowl, whisk together the pumpkin, sourdough starter, granulated sugar, oil, eggs and vanilla until well-combined.

Step 3

Add the flour, cinnamon, baking powder, baking soda, salt and chocolate chips (if using) and mix until just combined and no dry streaks remain. Don't over mix.

Step 4

Scoop the batter into the prepared muffin tins, filling the muffin cups 1/2 to 2/3 full. If desired, sprinkle a few regular or mini chocolate chips on top of the muffins.

Step 5

Bake for 15-20 minutes until the tops spring back lightly to the touch and/or a toothpick comes out clean or with a few moist crumbs.