Berries give this sweet-tart lemonade its pink color and cold seltzer water adds maximum bubbles.
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Pink Lemonade Syrup
Sparkling Pink Lemonade
In medium bowl, combine lemon slices, berries, and sugar. Use potato masher to mash until berries are broken down and sugar is completely wet, about 1 minute; set aside.
Cut remaining 4 lemons in half crosswise (the short way). Use citrus juicer to squeeze juice into liquid measuring cup. You should have about ¾ cup juice. (Save any extra juice for another use.)
Pour lemon juice into bowl with lemon-berry mixture. Use rubber spatula to stir until sugar is completely dissolved, about 1 minute.
Set fine-mesh strainer over second medium bowl. Carefully pour mixture through strainer. Use rubber spatula to press on lemons and berries to get out as much juice as possible. Discard lemon slices and berries in strainer.
Pour strained pink lemonade syrup into jar with tight‑fitting lid. (Pink lemonade syrup can be refrigerated for up to 1 week.)
To make 1 Sparkling Pink Lemonade: Stir or shake pink lemonade syrup to recombine. Place ice in glass. Pour cold seltzer into glass over ice. Add 3 tablespoons pink lemonade syrup to seltzer. Use spoon to stir gently to combine. Serve.
Chilling your seltzer water and serving lemonade over ice doesn’t just keep the drink cold, it also keeps more bubbles in your glass! Seltzer water is made fizzy by adding carbon dioxide gas to water while it’s under pressure. Once a can or bottle of seltzer is opened (and no longer under pressure), that gas will escape into the air. Keeping fizzy drinks cold helps slow that process down. The molecules in cold carbonated drinks move more slowly, so the gas creates tiny bubbles that rise to the surface slowly over time. Fun fact: Scientists have found that cold carbonated drinks make you feel less thirsty when you drink them!