How Much Caffeine Is in an Espresso Martini? (Real Numbers)

An espresso martini is a cocktail with a coffee inside it — and the coffee doesn’t care that it’s 10pm. Here are the actual numbers, ingredient by ingredient, and what they mean for the second round.

The caffeine ledger

Component	Caffeine
Single espresso shot (1 oz)	60–80mg
Double shot (2 oz, common in bars)	120–150mg
Coffee liqueur, 1 oz (Kahlúa-style)	~5mg
Coffee liqueur, 1 oz (cold-brew style, e.g. Mr Black)	10–25mg
Vodka, syrup	0mg

Home spec (classic recipe, single shot): ~65–85mg. Bar double-shot version: ~125–150mg. A regular coffee is 80–100mg, so each martini is roughly one coffee — sometimes closer to two. Cold-brew-based drinks can run higher still; concentrate strength varies wildly (details here).

The sleep math

Caffeine’s half-life is 5–6 hours. A double-shot martini at 10pm means ~65mg still circulating at 3am — a full cup of coffee’s worth, at the hour your deep sleep should be doing its work. Alcohol compounds the problem: it fragments sleep on its own, and the combination reliably produces the “slept eight hours, woke up wrecked” morning.

The masking effect

Caffeine doesn’t sober you up; it hides the drowsiness that normally tells you you’re drunk. Blood alcohol is unaffected. Practically: count espresso martinis as full cocktails and pace accordingly — the drink’s dessert-like friendliness (and its calories) makes that easy to forget.

Engineering the caffeine down

• Decaf shot: the whole drink drops to 10–15mg — a hot chocolate’s worth. Done well it’s nearly undetectable; builds in the decaf kit guide.
• Single shot, not double: halves the load with zero recipe damage.
• Watch the liqueur: cold-brew liqueurs are the stealth contributor; the liqueur guide lists who carries what.
• Zero-proof + decaf: the fully defused nightcap — how to build it.

The practical serving rule

Espresso martinis are aperitif-hour drinks masquerading as nightcaps. Serve them at 6–8pm — or serve the decaf build after dinner — and you get the whole experience without donating your night to it. Hosting a crowd? The batch recipe works with a decaf carafe running alongside the regular one.