Can Soda Recipe

Make simple syrup (if not pre-made)

Combine equal parts granulated sugar and water in a small saucepan (not included in ingredient list because simple syrup is listed as an ingredient). Heat gently, stirring until sugar dissolves. Cool to room temperature and chill before use.

Chill the carbonated water thoroughly—very cold water holds carbonation better. Use refrigerated sparkling water or soda machine output cooled to near 38°F (3°C).

In a small measuring cup or bowl, combine the chilled carbonated water (12 fl oz) with the simple syrup (1 fl oz). Stir gently once or twice with a long spoon to mix; avoid vigorous stirring to preserve carbonation.

Add the flavor extract (0.25 tsp) appropriate to the soda style (e.g., cola flavor for cola, lemon-lime for citrus soda). Stir gently to incorporate.

Add the citric acid solution or fresh lemon juice (0.25 tsp) to balance sweetness and provide acidity. If making cola, add caramel color (0.25 tsp) dropwise until you reach the desired color.

If desired and using, add the trace preservative (very small amount). Mix gently. Taste the soda and adjust: add up to 0.5 fl oz more simple syrup if you prefer sweeter, or an additional 0.125 tsp flavoring for stronger flavor. Do not over-stir.

Prepare the can: ensure the empty aluminum can and lid are sanitized and fully dry. If using home-canning equipment, follow the manufacturer's instructions for sealing carbonated beverages safely.

Carefully pour the mixed soda into the chilled can, leaving about 0.5 in (1.2 cm) headspace from the rim to allow for pressure. Work gently to retain carbonation.

Seal the can according to your canning/seaming equipment. If you do not have sealing equipment, serve immediately in a glass with ice and garnish instead of canning.

Chill the sealed can in the refrigerator for at least 1 hour before serving to allow flavors to marry and to stabilize carbonation.

To serve: open the can gently to avoid foaming, pour over ice if desired, and garnish with a lemon wedge or mint.