How to Make Club Soda at Home? | Two Simple Methods

Store-bought club soda is just carbonated water with two added minerals: sodium bicarbonate (baking soda) and sodium chloride (salt). That slightly salty, alkaline tang is what separates it from plain seltzer or sparkling water. You can replicate it in minutes with a SodaStream machine or go deeper with a home keg rig for bulk batches. Both methods use the same mineral recipe—the difference is how you add the bubbles.

What Makes Club Soda Different From Seltzer?

Plain seltzer is carbonated water with nothing else added. Club soda contains dissolved minerals—specifically baking soda and salt—that buffer the carbonic acid and create a smoother, slightly salty finish. Commercial brands like Schweppes use a precise ratio of these minerals; that ratio is roughly 0.6 grams of sodium bicarbonate per liter of water.

Without those minerals, you get fizzy water with a sharper, more acidic bite. With them, you get the recognizable club soda taste that works in cocktails and highballs.

Recipe: The Mineral Ratio That Works

The core recipe, tested across multiple home carbonation communities, uses a consistent mineral-to-water ratio. Start with purified or distilled water—tap water introduces off-flavors from chlorine or dissolved solids that compete with the clean mineral taste.

• Water: 1 pint (473 mL) per batch. For larger 5-gallon keg batches, scale the minerals.
• Baking soda (sodium bicarbonate): ⅛ teaspoon, slightly rounded, per pint.
• Salt (sodium chloride): A single small pinch per pint. Optional but recommended for the authentic profile.
• Optional flavor: 1 tablespoon of lime, lemon, or orange juice per pint for a flavored seltzer style.

Method 1: Making Club Soda With a SodaStream

This is the fastest route for most people, especially if you already own a SodaStream (Fizzi, One Touch, Art, or similar).

1. Fill the bottle: Pour 1 pint (473 mL) of cold purified water into a compatible SodaStream carbonator bottle.
2. Add minerals: Measure ⅛ teaspoon of baking soda (slightly rounded) and a pinch of salt, and drop them into the bottle.
3. Shake to dissolve: Cap the bottle tightly and shake until the baking soda and salt are fully dissolved—about 10 seconds.
4. Carbonate: Remove the cap and place the bottle in your SodaStream. Follow your model’s standard directions (typically press the button for 3–5 seconds, or until you hear the pressure release).
5. Cap immediately: Seal the bottle right after carbonation to hold the fizz.

If you’re buying a machine specifically for this, check tested options in our club soda maker roundup to find one that fits your counter space and budget.

The finished drink should taste smooth, with a subtle saltiness on the finish, not sharp or acidic.

Common mistake: Too much baking soda creates a chalky, overly alkaline taste. Stick to the ⅛ teaspoon measure—do not round it up generously.

Method 2: The DIY Keg Rig for Bulk Club Soda

If you go through several gallons per week or want the lowest unit cost ($0.08–$0.50 per gallon), a home carbonation rig pays for itself. The setup includes a CO2 tank, regulator, gas lines, and a corny keg or carbonator cap.

What You Need

• CO2 tank (5 lb or 10 lb)
• Regulator with pressure gauge
• Gas line assembly with check valve
• Corgy keg or 1–2 L PET bottle with carbonator cap

Steps for a 1-Liter Bottle (Active Carbonation)

1. Pre-chill the water: Fill the bottle with water and chill it to just above freezing (approx. 36°F / 2°C). Cold water absorbs CO2 much better than warm water.
2. Dissolve minerals: Before carbonating, add 0.6 g baking soda and a pinch of salt per liter. Shake until dissolved.
3. Set pressure: Open the regulator valve and set it to 40–45 PSI. Tighten all connections securely—this system operates under real pressure.
4. Connect and shake: Attach the bottle to the gas line. Open the tank knob slightly. Shake the bottle vigorously for 20–30 seconds to force CO2 into the cold water.
5. Disconnect: Turn the regulator valve off, disconnect the line, and cap the bottle with a plastic cap.

For a keg setup, carbonate passively: set the regulator to 40 PSI, attach the keg, and wait 24–48 hours at 36°F. The slower method produces finer, more stable bubbles.

Comparison: SodaStream vs. DIY Keg Rig

Flavor Variations (Turning It Into Lacroix-Style Sparkling Water)

The same mineral base works for flavored sparkling waters. Instead of or in addition to the baking soda and salt, add 1 tablespoon of fresh citrus juice (lime, lemon, orange) per pint before carbonating. For a more concentrated flavor without thinning the water, use a few drops of LorAnn’s Super Strength flavoring oils (raspberry, peach, tropical punch). Carbonate as usual.

Common Mistakes That Ruin Homemade Club Soda

• Tap water: Minerals in tap water (especially chlorine and calcium) clash with the added baking soda and salt, producing a flat or metallic taste. Use purified, distilled, or filtered water.
• Warm water: CO2 solubility drops dramatically above 50°F. Your water must be cold—below 40°F is ideal. Pre-chill the bottle or add crushed ice (then strain or let it melt before carbonating).
• Wrong baking soda ratio: Too little and you get plain seltzer; too much and the taste turns alkaline and chalky. Measure precisely.
• Skipping the seal: Once carbonated, cap the bottle immediately. Club soda loses fizz fast through an open neck.

Safety Notes for the DIY Carbonation Rig

A keg rig at 40–45 PSI is safe with standard equipment, but leaks can happen at connection points. Tighten all fittings with a wrench—never by hand alone. When storing the tank, close the valve fully (turn until you feel solid resistance against the seal). Never submerge gauges or the regulator in water; wipe them with a damp cloth if needed. The CO2 tank itself is safe at room temperature, but keep it upright and secured so it cannot tip over.

Which Method Should You Start With?

If you drink club soda a few times a week and want zero assembly, the SodaStream route is plug-and-play: buy a machine, mix minerals into the bottle, carbonate, and drink. If you refill a 1-liter bottle every other day or entertain regularly, the keg rig cuts your per-drink cost by more than half and lets you produce 5 gallons at once. Either way, the ingredient cost is negligible—your main investment is the hardware, and it pays for itself inside a year compared to store-bought cans.