4 limes lime – well scrubbed, ends trimmed, cut into eighths
4 cups cold water
0.5 cup granulated sugar
0.5 cup sweetened condensed milk
2 cups ice cubes
Instructions
Scrub the limes under warm water to remove any wax; trim the ends and cut each lime into eighths.
Add half of the cold water (2 cups), the sugar, and the lime pieces to a blender. Pulse on high for 10–15 seconds until the peels are coarsely shredded and the liquid turns pale green; do not overblend or it will become bitter.
Strain the mixture through a fine-mesh sieve into a pitcher, pressing gently to extract the juice; discard the solids.
Stir in the remaining cold water (2 cups) and the sweetened condensed milk until the drink is smooth and evenly combined.
Add the ice cubes and stir to chill.
Serve immediately; the flavor becomes more bitter if it sits as the peel oils infuse over time.