To a large bowl, add the buttermilk. If using the vinegar plus milk option, let sit for about 10 minutes to allow the milk to turn to buttermilk.
Add the pumpkin, eggs, butter, and vanilla and stir with a whisk to combine.
In a medium bowl, stir together the flour, sugar, baking powder, baking soda, spices, and salt.
Pour the dry ingredients over the wet and mix just until incorporated. Do not over mix.
Let batter rest for about 5 minutes.
Heat a non-stick griddle to 325 degrees.
Using a 1/3 cup pour the batter onto the griddle .
The pancakes are ready to flip when they look a little dry around the edges and start to form little bubbles, 1 to 2 minutes. Flip and cook on the other side until golden brown and completely cooked through, 1 to 2 more minutes.
Serve topped with butter, chopped pecans and maple syrup