1. Roll lemons on the counter to release more juice, then cut in half and juice until you have 1 cup.

2. In a large pitcher, whisk lemon juice and sweetened condensed milk until smooth.

3. Slowly add cold water while whisking continuously until combined.

4. Taste and adjust sweetness by adding simple syrup if desired.

5. Fill glasses with ice, pour in the lemonade, and garnish with lemon slices or mint.