Step 1

Wash and dry limes. Use peeler or microplane to remove the zest of about 4 limes. If you're using a peeler try to keep the amount of white pith to a minimum, but a small bit is alright.

Step 2

Juice limes and pass through a fine strainer.

Step 3

Warm the water and place in blender.

Step 4

Add lime zest, sugar, citric acid and 3.5 oz of lime juice to blender.

Step 5

Blend for about 30 seconds.

Step 6

Fine strain into bottle and refrigerate.