Boston Cooler

Pro tips

• Dissolve powdered sugar in lemon juice before adding other ingredients to avoid grittiness in the finished drink.
• Use ice to chill the glass and ingredients; add carbonated water last to preserve carbonation.
• Fresh-squeezed lemon juice makes a noticeable difference in brightness compared to bottled juice.

Substitutions

• Powdered sugar → simple syrup or granulated sugar dissolved in water (maintains sweetness with easier mixing)
• Old Mr. Boston rum → any light or white rum (maintains the spirit base; avoid dark or spiced varieties)

Can I make a Boston Cooler without carbonated water?

Carbonated water is essential to the drink's character. Flat water or still mixers will significantly change the texture and refresh factor.

What type of rum works best in a Boston Cooler?

Light or white rum is traditional. Old Mr. Boston imported rum is the classic choice, but any light rum of similar proof works well.

Should I use fresh lemon juice or bottled?

Fresh-squeezed lemon juice is strongly recommended for brightness and flavor; bottled juice produces a duller, less vibrant result.

How do I properly dissolve the powdered sugar?

Mix the powdered sugar with lemon juice first to create a simple syrup-like base before adding rum and carbonated water.