2. Make the Batter
In a large bowl, whisk together the flour, pumpkin pie spice, baking powder, baking soda, and salt.
In a second large bowl, whisk together the buttermilk, pumpkin purée, sugar, butter, and eggs. Add the flour mixture to the pumpkin mixture and whisk until just combined. It's okay for the mixture to have a few lumps.
Fold in 1/2 cup of the chocolate chips.