01 - Roll lemons firmly on a countertop to release more juice. Slice in half and use a citrus juicer to extract 1 cup of fresh lemon juice.
02 - In a large pitcher, whisk together the lemon juice and sweetened condensed milk thoroughly until the mixture is smooth and homogenous.
03 - Slowly pour in the cold water while stirring constantly. Blend until the mixture is evenly combined. Sample and adjust sweetness with simple syrup to taste.
04 - Refrigerate the lemonade for at least 30 minutes until thoroughly chilled or serve immediately over ice as preferred.
05 - Fill glasses with ice cubes, pour in the chilled lemonade, and garnish each serving with a slice of lemon and fresh mint leaves. Stir with a straw if desired.