Place pumpkin puree, pumpkin spice and ginger in a mixing bowl and whisk together. Set aside.
In another mixing bowl whisk together flour, sugar, baking powder, baking soda, and salt.
Add the buttermilk, butter and egg to the flour mixture. Stir together with a fork until mixture comes together and no dry spots remain.
Stir pumpkin mixture into the waffle batter until well combined.
Set waffle iron to desired temperature. Once heated, lightly spray the top and bottom with nonstick cooking spray. Pour ⅓ cup of the batter into the center of the waffle iron and press. Once desired doneness has been achieved, transfer waffle to a baking sheet and repeat until all batter has been used.
Serve with softened butter and maple syrup.