What Is Irish Coffee?
Irish coffee is hot coffee with Irish whiskey, sugar, and a layer of fresh cream floated on top. You drink the coffee through the cream. That's the entire point — warm whiskey-laced coffee hitting your lips through a cold layer of cream.
It was invented by Joe Sheridan, the head chef at Foynes Airbase in County Limerick. In 1942 or 1943 — accounts differ by a year — a flying boat turned back to Foynes due to bad weather over the Atlantic. The passengers were cold, tired, and miserable. Sheridan added whiskey to their coffee and topped it with cream.
When a passenger asked if they were drinking Brazilian coffee, Sheridan replied: "No, that's Irish coffee."
The name stuck. The recipe hasn't changed.
The Original Irish Coffee Recipe
This is the standard as recorded by the International Bartenders Association and consistent with what Sheridan served.
Ingredients
- 120 ml (4 oz) freshly brewed hot coffee — strong, not overpowering
- 50 ml (1.7 oz) Irish whiskey — Jameson, Powers Gold Label, or Paddy
- 1 teaspoon brown sugar or 1 sugar cube — white works, but brown adds warmth
- 50 ml (1.7 oz) fresh heavy cream, chilled — lightly whipped to just thickened, not stiff
Method
- Preheat the glass. Fill a stemmed glass or heat-proof mug with hot water. Let it sit for 30 seconds, then empty. A warm glass keeps the coffee hot longer.
- Build the drink. Pour the hot coffee into the glass. Add the sugar and stir until completely dissolved. This step is critical — the sugar helps the cream float.
- Add the whiskey. Stir gently.
- Float the cream. Hold a spoon just above the surface of the coffee, dome-side up. Pour the cream slowly over the back of the spoon. It should spread across the top and sit as a distinct white layer. Don't stir it in. Don't let it sink.
- Serve immediately. No straw, no stirring. Drink through the cream.
Time: 5 minutes | Serves: 1
Why the Sugar Matters
Without sugar, the cream sinks. The dissolved sugar increases the density of the coffee layer just enough that the lighter cream can float on top. Skip the sugar and you get a murky brown drink instead of the two-tone effect. It's chemistry, not decoration.
The Foynes and San Francisco Connection
After the war, Foynes closed and transatlantic flights moved to Shannon Airport. Irish coffee went with them. The Shannon Airport bartender continued to serve it to passengers heading west.
In 1951, travel writer Stanton Delaplane drank one at Shannon and was struck by it. He brought the idea back to San Francisco and worked with Jack Koeppler at the Buena Vista Cafe, near Fisherman's Wharf, to recreate it. They struggled for months — the cream kept sinking.
Koeppler eventually flew to Ireland to learn the technique. The secret was the cream: it needed to be lightly whipped to thicken it, but not stiff. On November 10, 1952, the Buena Vista served its first successful Irish coffee.
Joe Sheridan himself later emigrated to work at the Buena Vista. The café still makes it today — they go through around 2,000 Irish coffees a day. It's become a San Francisco institution as much as an Irish one.
Irish Coffee with Baileys
A popular variation that swaps some or all of the whiskey for Baileys Irish Cream. It's sweeter and less sharp — a different drink, but a crowd-pleaser.
Ingredients
- 120 ml hot coffee
- 30 ml Baileys Irish Cream
- 20 ml Irish whiskey (optional — some people use Baileys alone)
- Whipped cream for topping
- Cocoa powder or grated chocolate (optional)
Method
Same approach: preheat glass, add coffee, stir in Baileys (and whiskey if using), float cream on top. Dust with cocoa if you want. This version is richer and works well as a dessert drink after dinner.
Cold Irish Coffee
For warmer weather or when you want the flavour without the heat.
Ingredients
- 120 ml cold brew coffee or chilled espresso
- 50 ml Irish whiskey
- 1 tablespoon simple syrup (or 1 teaspoon sugar dissolved in a splash of hot water)
- Ice
- 50 ml heavy cream, lightly whipped
Method
Fill a glass with ice. Pour over the cold coffee, whiskey, and simple syrup. Stir. Float the cream on top. Serve.
Which Whiskey for Irish Coffee?
Any Irish whiskey works, but the character of the drink changes with the bottle:
| Whiskey | Notes | Best For |
|---|---|---|
| Jameson | Smooth, light, easy | The default — works every time |
| Powers Gold Label | Slightly richer, more pot still flavour | A bolder cup |
| Paddy | Mild, slightly sweet | Gentle, approachable |
| Redbreast 12 | Rich, full-bodied, sherry-cask notes | A special occasion coffee |
| Tullamore D.E.W. | Triple-blended, smooth | Good all-rounder |
Don't use Scotch. Don't use bourbon. The point is Irish whiskey — triple-distilled, smooth, without the smoke or sweetness of other traditions.
Getting the Cream Right
The cream is the part that separates a proper Irish coffee from a mug of whiskey-spiked coffee with some milk splashed in.
- Use heavy cream (double cream). Not light cream, not half-and-half, not milk.
- Whip it lightly. Pour cold cream into a bowl and whisk by hand until it just holds its shape — the kind that pours but thickly. If it stands in peaks, you've gone too far.
- Pour over the spoon. The spoon disperses the weight of the cream across the coffee surface. Without it, the cream plunges straight through.
- Keep it cold. The temperature contrast — hot coffee below, cold cream above — is part of the experience.
Where to Drink It in Ireland
- Foynes Flying Boat & Maritime Museum, County Limerick — where it started. They serve Joe Sheridan's recipe and run an Irish Coffee Experience.
- Shannon Airport — still serves Irish coffee to departing passengers
- The Buena Vista Cafe, San Francisco — the American cathedral of Irish coffee (ships American visitors to Ireland just to learn more)
- Any pub in Ireland — most bartenders can make it; many will argue about the technique
Sources: Wikipedia (Irish coffee); Foynes Flying Boat Museum records; NotebookLM research; IBA Official Cocktail specifications.