Lemonade not only tastes refreshing on a hot day, it also provides a vitamin C boost. Adding sparkling water or club soda gives this summer standard a bubbly twist. Start with fresh lemons or packaged lemonade concentrate; either method works well with sparkling water to produce a drink that has all the flavour of lemonade with the tongue-tingling carbonation of soda.
Squeeze sufficient lemons to make 1 cup of lemon juice. Strain the juice into the measuring cup to remove seeds and pulp.
Bring the water to a boil and add 1 cup of sugar, stirring constantly, until all of the sugar dissolves. Turn off the heat as soon as the sugar crystals dissolve to form a simple syrup.
Pour the lemon juice into a pitcher. Add the simple syrup to the lemon juice and stir.
Add sparkling water, club soda or seltzer water to the lemon juice and simple syrup. Taste the mixture frequently after mixing a portion of the sparkling water into the lemonade base; those who like stronger lemonade can stop adding water, while those who prefer a lighter lemon taste can add more.
Chill the lemonade for a few hours or overnight. Keep the lid on the pitcher to slow carbonation loss.
Read manufacturer's directions on the can of frozen lemonade concentrate to ascertain the amount of club soda or sparkling water needed to mix with the product.
Open the can of concentrated lemonade and place the slushy concentrate in the pitcher.
Add sparkling water or club soda to taste, checking frequently to find the preferred proportion of liquid to concentrate.
Refrigerate the mixture, making sure the pitcher's lid fastens tightly to keep the bubbles in the lemonade where they belong.
Replace the sugar in fresh sparkling lemonade with sugar substitute according to package directions for a sugarless version of the drink. Try a mixture of still water and sparkling water for less carbonated, but still slightly bubbly lemonade. Serve lemonade over ice and garnish with mint leaves, slices of lemon or maraschino cherries. Fresh sparkling lemonade will keep in the refrigerator for up to three days before its flavour and carbonation begin to dissipate; lemonade from concentrate should last a day longer. Pour leftover lemonade into ice trays and freeze to make tasty cubes for adding to other drinks.
Tonic water resembles club soda, but the bitter drink will ruin a pitcher of lemonade; steer clear of tonic water in favour of mineral water or seltzer.