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Ingredients
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Soda Fountain Base & Carbonation
Optional Flavor Boosters & Garnishes
Method
Soda Fountain Base & Carbonation
Make simple syrup
Combine 1 cup sugar with 1 cup water in a small saucepan. Heat over medium, stirring until sugar dissolves. Bring to a gentle simmer for 1 minute, then remove from heat and cool to room temperature (about 15–20 minutes).
Prepare soda concentrates
Measure the cola, lemon-lime, and orange syrup concentrates into a clean pitcher. Add the cooled simple syrup and stir to combine. This mixture is the fountain syrup blend that will be diluted with carbonated water.
Mix with carbonated water just before serving
To make individual servings (approx. 12–14 fl oz / 355–415 ml each), fill a glass with 1 cup (8 fl oz) carbonated water and add 2 tablespoons of the syrup blend. Stir gently to combine. For a slightly sweeter/more intense flavor, increase the syrup to 2 1/2 tablespoons. The recipe quantities provided yield about 10 cups carbonated water of soda and the listed syrup concentrates — enough to serve roughly 10–12 bottomless 12 oz glasses when refilling frequently.
Optional Flavor Boosters & Garnishes
Serve fountains pop style
Fill each glass halfway with ice (about 1 to 1 1/2 cups). Squeeze a lemon or lime wedge into the glass if desired, then drop the wedge in. Add an orange slice for a citrus hint. Pour the prepared soda into the glass (approx. 10–12 fl oz) made by combining carbonated water and syrup as instructed. Garnish with a maraschino cherry or a splash (about 1 teaspoon) of grenadine for color and extra sweetness.
Bottomless service notes
Keep the remaining carbonated water chilled and the syrup blend refrigerated. For continuous (bottomless) refills at a gathering, pre-mix small batches (per-pitcher: 1 quart carbonated water + 1/3 cup syrup blend) and keep them chilled; combine fresh carbonated water with syrup just before refilling to preserve fizziness. Re-stir or re-carbonate briefly if soda goes flat (use a soda siphon or replace with freshly chilled carbonated water).
Adjustments and variations
To make a single-flavor soda, use only the cola or lemon-lime or orange syrup portion and omit the others. For diet/low-calorie versions, substitute sugar simple syrup with an appropriate concentrated liquid sweetener and use diet syrup concentrates. For an extra creamy fountain pop (like a float), add 1 scoop of vanilla ice cream to the glass after pouring the soda.