How much water to add for batch?

Personally, I would not add water. The ice is more about chilling the drink. I would chill it in some other matter rather than water down the cocktail.

Hi Jacob, try adding equal amounts agave syrup and water to your recipe. So for six margaritas reduce tequila and Cointreau slightly then add another ounce or so of agave and an ounce of water. You're going to have to test these first! Please let us know how yours turn out.