Boston Cooler

Pro tips

• Dissolve the powdered sugar in the rum and lemon juice before adding carbonated water to ensure even sweetness throughout the drink.
• Use freshly squeezed lemon juice and add it immediately after juicing for maximum citrus brightness.
• Chill your glass beforehand and serve immediately after adding carbonated water to maintain maximum carbonation.
• Pour carbonated water last and gently to preserve the fizz that defines a cooler.

Substitutions

• Mr. Boston Rum → light or white rum (maintains similar proof and neutrality)
• Powdered sugar → simple syrup, 1 tsp (dissolves instantly, no stirring needed)
• Carbonated water → club soda or seltzer (equivalent fizz and mouthfeel)

Storage & make-ahead

Boston Coolers are best served immediately after preparation and should not be stored, as carbonation will dissipate.

Can I make a Boston Cooler without carbonated water?

Carbonated water is essential for the drink's signature fizz and refreshing quality. Club soda or seltzer water are appropriate substitutes, but flat water will noticeably change the texture.

What type of rum works best in a Boston Cooler?

The recipe calls for Mr. Boston Rum, a light, neutral rum. Any light or white rum with similar proof and flavor profile will work as a substitute.

Should I use fresh or bottled lemon juice?

Fresh-squeezed lemon juice delivers better flavor and brightness. Bottled lemon juice contains preservatives that can dull the cocktail's taste.

How do I balance sweetness in this drink?

The powdered sugar dissolves easily and provides balanced sweetness. Taste as you make it—add sugar gradually if you prefer less sweetness, or increase it slightly if the lemon is particularly tart.