Every Spritz guide on the internet tells you the same thing: 3 parts Prosecco, 2 parts bitter, 1 part soda. But almost none of them explain why those numbers exist — or when ignoring them makes a genuinely better drink.

We tested 11 variations of the classic formula, changing one variable at a time, to understand what each part of the ratio actually does. This is what we found.

The standard: 3-2-1

Classic Spritz Formula

In a standard large wine glass, this translates to roughly 90ml Prosecco, 60ml bitter, and 30ml soda — giving you a drink around 200ml before ice melt. The resulting ABV depends on which bitter you use: with Aperol (11%) you land around 8–9% ABV; with Campari (25%) you're closer to 13–14%.

What each part actually does

The 3: Prosecco

Prosecco is the body of the drink. It provides the acidity, the effervescence, and the structural backbone. Without enough of it, the Spritz tastes like a diluted bitter with bubbles. Too much, and the bitter becomes a faint suggestion rather than a character.

The "3" keeps the drink wine-forward. You should always taste Prosecco first on the palate, with the bitter arriving as a second wave. If the bitter hits first, your ratio has drifted.

The 2: Bitter liqueur

This is the identity of the drink. The "2" is calibrated to give the bitter enough presence to define the flavour profile without overwhelming the Prosecco. It's the difference between a cocktail and a flavoured wine.

At 2 parts, Aperol creates a gentle bittersweet warmth. Select adds herbaceous depth. Campari delivers a serious bitter punch. Cynar contributes an earthy, vegetal complexity. The ratio stays the same; the personality changes entirely.

The 1: Soda water

The most misunderstood part of the Spritz. Soda does almost nothing to the flavour — at 1 part, it's barely perceptible as a taste. What it does is textural: it adds a second layer of carbonation (finer, sharper bubbles than Prosecco's) and lengthens the drink slightly, making it more refreshing and sessionable.

Skip the soda and the drink tastes heavier, shorter, more like a wine cocktail than a Spritz. Add too much and you dilute everything into sparkling bitterwater.

The 11 variations we tested

We made every version side by side using Aperol as the control bitter, Prosecco DOC Brut, and standard soda water. Each was tasted by three people, blind where possible.

Variation 1: 4-2-1 (more Prosecco)

Result: Lighter, drier, more wine-forward. The Aperol becomes a background note rather than a co-star. This is the preferred ratio at many serious Venetian bacari — ideal for early evening when you want something crisp and long rather than sweet and bold. Verdict: excellent alternative for warm weather.

Variation 2: 2-2-1 (less Prosecco)

Result: Noticeably sweeter and more bitter simultaneously. The Aperol dominates. It tastes closer to a bitter soda than a wine drink. This is the ratio that makes people say "Spritz are too sweet." Verdict: avoid.

Variation 3: 3-3-1 (more bitter)

Result: With Aperol, this becomes cloying. With Campari, it actually works — the extra bitterness stands up to the Prosecco and creates a drink with real authority. Verdict: only works with high-ABV, intensely bitter liqueurs.

Variation 4: 3-1-1 (less bitter)

Result: Essentially sparkling wine with a hint of colour. Pleasant but pointless — you lose the entire reason for making a Spritz. Verdict: just drink Prosecco.

Variation 5: 3-2-0 (no soda)

Result: Richer, more concentrated, slightly heavier in the mouth. Not bad at all — this is actually how some Roman bars serve it. You lose the textural contrast of the double carbonation but gain intensity. Verdict: valid shortcut, especially if your Prosecco is very fizzy.

Variation 6: 3-2-2 (double soda)

Result: Watery. The extra dilution kills the bitter and flattens the Prosecco's acidity. It's refreshing in the way that water is refreshing — not in the way a cocktail should be. Verdict: never do this.

Variation 7: 3-2-1 with Extra Dry Prosecco

Result: Sweeter than expected. "Extra Dry" Prosecco (confusingly) has more residual sugar than Brut. Combined with Aperol's sweetness, the drink tips into candy territory. Verdict: always use Brut or Extra Brut.

Variation 8: 3-2-1 with Franciacorta

Result: A revelation. The finer, more persistent bubbles from traditional-method sparkling wine create a silkier texture. The biscuity, yeasty notes add complexity. Significantly more elegant. Verdict: worth the upgrade for a special occasion.

Variation 9: 3-2-1 with small ice vs. large ice

Result: Small ice melts within 4 minutes and creates a noticeably diluted, watery drink by the time you're halfway through. Large cubes (4cm+) maintained the ratio integrity for 12+ minutes. Verdict: ice size matters more than any ratio adjustment.

Variation 10: 3-2-1 built in a tumbler vs. wine glass

Result: The wine glass keeps the aromatics focused — you smell the bitter and the Prosecco together before you sip. The tumbler disperses everything. The drink is identical in taste but the wine glass experience is meaningfully better. Verdict: always use a wine glass.

Variation 11: Half-and-half bitter (1 Aperol + 1 Select)

Result: The best of both worlds. Aperol's sweetness cushions Select's drier, more herbaceous profile. More complex than either alone. This is a common Venetian move and it deserves to be more widely known. Verdict: our favourite variation.

When to break the ratio

The 3-2-1 is a starting point, not a law. Here's when deviating makes sense:

"The ratio is a recipe. Breaking the ratio is cooking."

The one rule that never changes

Ice. Whatever ratio you choose, use large ice. A single large cube or 3–4 big pieces. Small ice is the fastest way to ruin any Spritz, regardless of how perfect your pour is. The dilution from melting ice will destroy your carefully chosen ratio within minutes.

Get the ice right, and even a rough 3-2-1 pour will taste good. Get the ice wrong, and even a precisely measured drink will taste like bitter sparkling water by the second sip.