Preheat the oven to 350 degrees. Line the cups of a standard 12 cup muffin pan with paper liners or greater with nonstick cooking spray. Set aside.
In a medium bowl, whisk together the flour, baking soda, cinnamon, ginger, nutmeg, cloves and salt.
In a large bowl, combine the pumpkin, granulated sugar, brown sugar, oil, buttermilk, eggs and vanilla. Stir with a spatula until smooth.
Gradually add the dry ingredients to the pumpkin mixture and stir until just combined. Gently fold in 3/4 cup of chocolate chips. Don't overmix.
Divide the batter between the muffin cups, filling each three-quarters full.