Whisk together flour, salt, sugar, and baking soda.
Mix together buttermilk, eggs, butter, and vanilla.
Pour into dry mixture and stir together just until combined.
Pour batter into waffle iron and cook to your iron's instructions.
Serve immediately with your favorite syrup.
To freeze:
Allow waffles to cool completely in a single layer on a cooling rack.
When cooled, divide and package into zip top freezer bags.
To cook after freezing:
Simply remove number of waffles you would like to prepare for your meal from the zip top bag and toast in your toaster oven according to your toaster directions.