An Irish Whiskey Old Fashioned is the classic Old Fashioned built on Irish whiskey instead of bourbon or rye: 60ml of Irish whiskey, a teaspoon of sugar (or a bar-spoon of simple syrup), two to three dashes of Angostura bitters, stirred over ice and served in a rocks glass with a large cube and an expressed orange peel. Swapping in a smooth, triple-distilled Irish whiskey gives you a softer, gentler Old Fashioned — all the backbone of the original with none of the burn.

The Old Fashioned is the oldest cocktail worth the name — whiskey, sugar, bitters, ice, and nothing to hide behind. That is exactly why it is the best possible test of a whiskey. There is no ginger beer, no coffee, no cream to paper over the cracks. What is in the glass is mostly what is in the bottle. Get the whiskey right and the drink almost makes itself.

Here is how to build a proper one, the step nearly everyone rushes, and the Irish whiskey we would reach for.

What makes an Old Fashioned "old fashioned"?

The name is a bit of a wink. When bartenders in the late 1800s started dressing cocktails up with liqueurs and fruit, a certain kind of drinker pushed back and asked for their whiskey the old-fashioned way — just sugar, bitters and ice. The recipe never really needed improving, and it still doesn't. Four ingredients, one technique, and the whiskey does the talking.

What you need

• 60ml Irish whiskey (a smooth, triple-distilled blend is ideal)

• 1 teaspoon caster sugar, or 1 bar-spoon (about 7.5ml) simple syrup

• 2–3 dashes Angostura aromatic bitters

• A large ice cube or sphere

• A strip of orange peel, to garnish

• Optional: a splash of water or soda to help the sugar dissolve

Kit: a rocks glass (also called an Old Fashioned glass — no coincidence), a bar spoon, and a little patience.

How to make an Irish Whiskey Old Fashioned

1. Dissolve the sugar first. Add the sugar to your rocks glass with the bitters and a tiny splash of water. Stir until the sugar has mostly dissolved. If you are using simple syrup, skip straight ahead — the sugar is already liquid.

2. Add the whiskey and ice. Pour in the Irish whiskey and drop in one large cube. One big cube, not a fistful of small ones.

3. Stir — don't shake. Stir gently for 20–30 seconds. You are chilling the drink and adding a little water at the same time. This is the step people rush, and it is the whole game.

4. Express the peel. Hold the orange peel over the glass, skin-side down, and pinch it firmly so the oils spray across the surface. Rub it round the rim, then drop it in.

5. Taste it. It should be spirit-forward but rounded, faintly sweet, warmly bitter, and cold. If it bites, it needs another few seconds of stirring.

The step everyone rushes: stir it properly

The single biggest mistake home bartenders make with an Old Fashioned is under-stirring. It feels like you are just moving the drink around, so it is tempting to give it two turns and call it done. But that stir is doing real work: it is melting a small, deliberate amount of ice into the whiskey. That water is not diluting the drink so much as opening it up — softening the alcohol, releasing the aromatics, and turning a hot pour into a smooth one.

Twenty to thirty seconds of steady stirring, with one large cube that melts slowly and evenly, is the difference between a harsh drink and a beautiful one. Small ice melts too fast and waters it out; no stir at all leaves it sharp. This is exactly why a gentle, triple-distilled Irish whiskey shines here — it starts smooth, so a proper stir carries it the rest of the way home.

Which Irish whiskey should you use?

You want a whiskey with enough character to stand up to the sugar and bitters, but smooth enough that you actually want to sip it slowly. Triple-distilled Irish whiskey is almost purpose-built for this: the extra distillation makes for a rounder, gentler spirit than a bourbon or a rye, so your Old Fashioned lands softer without losing its backbone.

Our pick is The Bird, Flying Tumbler's flagship — a triple-distilled blend of grain whiskey and single malt, non-chill filtered and with no added colouring, so nothing is stripped out and nothing is painted back in. It has the body to hold its own against the bitters and a warmth that a good stir turns silky. If you like your Old Fashioned bolder and more spirit-forward, reach for The Tippler instead — the higher-strength expression in the range, built for people who take their whiskey with intent.

Either way, the beauty of the Old Fashioned is that it puts the whiskey centre stage. It is a drink for slowing down — for the second half of a long evening, a good story half-told, and no rush to finish. Adventure in every drop; home in every sip.

Variations to try

• Maple Old Fashioned: swap the sugar for a small spoon of maple syrup for a rounder, autumnal sweetness.

• Smoked orange: char the orange peel lightly before expressing it for a wisp of smoke.

• Irish Old Fashioned, long: top with a splash of soda over fresh ice for an easier, longer version on a warm evening.

Frequently asked questions

What's the difference between an Irish Old Fashioned and a bourbon one? Only the whiskey — and it matters. Bourbon brings sweetness and oak; Irish whiskey, especially triple-distilled, brings a smoother, gentler character, so the finished drink is softer and less fiery.

Sugar cube or simple syrup? Either works. A cube or loose sugar muddled with bitters is the traditional route; simple syrup is faster and dissolves cleanly, and is the more reliable choice if you are making more than one.

Do I have to stir it — can I shake it? Stir it. Shaking aerates the drink and makes it cloudy and over-diluted. An Old Fashioned should be clear, cold and silky, which only stirring gives you.

Which Flying Tumbler whiskey is best for an Old Fashioned? The Bird for a smooth, classic build; The Tippler if you want it bolder and more spirit-forward.