In a small pot, add the butter and put over medium heat. Melt completely and remove from heat. Set aside.
In a large bowl, add the dry ingredients: flour, cane sugar, sea salt, and baking powder and whisk together.
Add melted butter, eggs, pumpkin, buttermilk, and vanilla extract, and whisk to combine completely.
Allow waffle iron to get warm, I cooked these on setting 4 on my Cuisinart waffle iron, which is medium-high heat. Measure 1/2 cup of batter into the waffle iron (or 1 cup if you want to fill the waffle iron completely). Cook waffles until golden brown, about 3-5 minutes, depending on your waffle iron.
Serve with your favorite waffle toppings like butter and maple syrup. Store extra waffles in the fridge for up to 3 days, or freeze for up to 3 months.
Continue with all the waffle batter and then top with your favorite toppings like butter, maple syrup or fresh fruit.