Diet Coke Recipe

Chill components

Ensure the carbonated water (or soda stream carbonated water) and the diet cola syrup are well chilled before mixing. Cold liquids retain carbonation better and produce a crisper mouthfeel.

Fill glass with ice (optional)

Place about 1 cup of ice cubes into a highball or Collins glass if you prefer your drink cold and diluted slightly. For maximum carbonation retention, skip ice and chill the glass instead.

Add syrup

Measure and pour 1 fluid ounce of diet cola syrup into the glass (or into the soda stream bottle if using a dispensing setup). Standard dispense ratios target roughly 1:12 syrup to carbonated water for Diet Coke-style strength; adjust to taste.

Top with carbonated water

Carefully pour 12 fl oz of cold carbonated water down the side of the glass to minimize foaming and preserve carbonation. If using fountain equipment or a soda dispenser, follow the device's dispense for a consistent flow.

Stir gently

Using a long spoon, stir the drink gently just once or twice to combine syrup and carbonated water. Avoid vigorous stirring to prevent excessive loss of fizz.

Garnish and serve

Optionally squeeze a lime wedge over the drink and drop it in for a citrus accent. Serve immediately with a straw or sip directly.