In a large bowl, mix together the flour, milk, sour milk (or alternative), salt, and butter. Cover and let sit on the counter top (soak) for 8-12 hours. Overnight works well.
Heat your waffle iron.
Mix in the eggs, baking powder, and seasoning.
Scoop into waffle maker ½ cup at a time and cook according to your waffle maker's instructions.
Store in an airtight container. These waffles may also be frozen in freezer containers or freezer bags.