The volume of lemon juice for 2 quarts of lemonade varies according to taste and with the amount of sugar used. The volumes of sugar and lemon juice should be approximately equal. Prepare a batch of lemonade, note the quantities of lemon juice and sugar, and adjust to hit your sweet spot.
Baseline Quantities
A typical recipe for 2 quarts of lemonade calls for 1 2/3 cups lemon juice and an equal volume of sugar. Increase the amount of lemon juice to enhance the flavor; this will add tartness. Add sugar for more sweetness. The key is to find the desired amount of lemon flavor, and then adjust the quantity of sugar to achieve your preferred sweetness.
Making Lemonade
To make lemonade, simply combine lemon juice, sugar and water. Add ice cubes and optional slices of fresh lemon.
Lemonade sometimes suffers from incompletely dissolved sugar, resulting in grittiness and residue. Avoid this by making a simple syrup. Combine equal amounts of water and sugar in a small saucepan. Boil and simmer to dissolve the sugar. Let the syrup cool, then combine with other ingredients.