Add the remaining water (14 oz.) and whisk until smooth.
Ferment the mixture by placing it in a non-reactive storage container about twice the volume of the batter. Cover with plastic wrap and let it rest at room temperature overnight. NOTE: The batter isn’t ready until there are noticeable air bubbles throughout the batter. This could take two days (or warmer air temperature).
Refrigerate the fermented batter until needed for service.