Preheat oven to 350* F. Line 12 standard muffin tin with paper liners (or spray with cooking spray).
In a large bowl, whisk flour, sugar, cinnamon, baking powder, baking soda, and salt.
In a separate bowl whisk buttermilk, pumpkin, oil, eggs, and vanilla until combined.
Add pumpkin mixture to flour mixture, gently folding until combined. Stir in ¼ cup chocolate chips.
Divide batter among prepare muffin cups. Sprinkle remaining chocolate chips over tops of muffins.
Bake for 20 to 25 minutes, or until a toothpick inserted in the center comes out clean. Let cool in pan for 10 minutes and the remove to a wire rack to cool completely.
Recipe by Alida's Kitchen at https://www.alidaskitchen.com/2013/09/18/pumpkin-chocolate-chip-muffins/