In short: The key difference between a Manhattan and an Old Fashioned is the sweetener and structure. A Manhattan uses sweet vermouth, creating a smoother, herbal and slightly drier cocktail served “up” without ice. An Old Fashioned uses sugar or syrup, resulting in a bolder, richer drink served on the rocks with an orange twist. Both cocktails contain whisky and bitters, but their flavour profile, serving style and overall experience set them apart.

When it comes to classic whisky cocktails, few names carry as much weight as the Manhattan and the Old Fashioned. Both are stirred, spirit-forward serves that have stood the test of time. But while they share a whisky base and an old-school aura, these cocktails are anything but interchangeable.

So if you’re standing at the bar—or setting up your own home pour—and trying to decide between the two, here’s everything you need to know.

From ingredients and taste, to history, technique and how we make them at The Glenlivet, this is your ultimate Manhattan vs Old Fashioned guide.

Simple, strong and endlessly adaptable, the Old Fashioned is often referred to as the blueprint for all modern cocktails. It dates back to the early 19th century, when drinks were often described by their components: spirits, sugar, water and bitters. Over time, the name ‘Old Fashioned’ came to refer to that pared-back, traditional style of mixing.

Today, the cocktail remains a staple in whisky bars and kitchens alike—and one that invites experimentation.

Our Old Fashioned cocktail recipe is made with The Glenlivet 12 Year Old—a smooth and fruit-forward single malt that balances citrus peel and bitters beautifully. It’s a clean, modern take that honours the classic while keeping things unmistakably The Glenlivet.

The Manhattan emerged around the 1860s in New York City and quickly gained popularity for its rich, slightly herbal profile. Traditionally made with rye whisky, sweet vermouth and bitters, it’s a cocktail with structure—elevated, sophisticated and just a little bit decadent.

The Glenlivet twist on the classic comes via our Maraschino Cherry Manhattan, made using The Glenlivet 15 Year Old. The extra time spent in French oak casks brings subtle spice and richness to the drink, with the maraschino cherry garnish adding a final note of dark, jammy sweetness.

On the surface, these two drinks seem closely related. Both are stirred over ice and served in a lowball or coupe. Both are built around whisky. But their ingredients, taste and overall feel set them apart.

–  Old Fashioned: Whisky, sugar (or simple syrup), Angostura bitters, orange twist

–  Manhattan: Whisky, sweet vermouth, bitters, maraschino cherry

The Old Fashioned keeps things minimal. There’s no modifier like vermouth—just the whisky, sweetened and spiced. The Manhattan, by contrast, brings in vermouth for depth and herbal warmth, making it a touch more complex.

–  Old Fashioned: Bold, clean and direct. The whisky is the hero, slightly sweetened and aromatised with bitters.

–  Manhattan: Smoother and more rounded, thanks to the vermouth. Slightly richer, with a softer finish and more herbal notes.

If you want to experience your whisky front and centre, the Old Fashioned is your go-to. If you’re after something a little more polished and layered, opt for the Manhattan.

An Old Fashioned is typically sweeter. It uses pure sugar or syrup, which creates a more straightforward sweetness. A Manhattan gets its sweetness from vermouth, which brings herbal and slightly bitter notes alongside sugar. As a result, it tastes more balanced and less overtly sweet.

Discover more bitter whisky cocktails.

Both cocktails contain a similar amount of whisky, but the Manhattan is diluted slightly less because it is served without ice. However, alcohol strength ultimately depends on the recipe proportions used.

In practice, they feel similar in strength — the difference lies more in flavour than potency.

Garnishes matter more than you might think:

–  Old Fashioned: Orange peel, expressed over the drink for that zesty aroma

–  Manhattan: Typically garnished with a maraschino cherry, adding sweetness and visual flair

The choice of garnish not only affects the drink’s aroma and finish—it sets the tone for the experience.

There’s no right or wrong answer here—it all depends on mood, occasion and preference.

When to choose an Old Fashioned:

–  You want whisky front and centre

–  You prefer a slightly sweeter, more direct profile

–  You enjoy a cocktail served over ice

When to choose a Manhattan:

–  You prefer herbal depth from vermouth

–  You enjoy a smoother, silkier texture

–  You want a pre-dinner cocktail served up

For more inspiration on how these drinks compare to other whisky-based classics, check out our article on drinks similar to a Manhattan.

The good news? Both cocktails are easy to master at home. The key is quality ingredients, proper technique and ice that won’t dilute too quickly.

–  Add 2 parts The Glenlivet 12 Year Old, 1 sugar cube or bar spoon of syrup, and 2–3 dashes of bitters to a mixing glass

–  Stir with ice until chilled

–  Strain over a large ice cube into a rocks glass

–  Garnish with an orange twist

Try our full Ultimate Old Fashioned recipe for the exact method.

–  Add 2 parts The Glenlivet 15 Year Old, 1 part sweet vermouth and 2 dashes of bitters to a mixing glass

–  Stir with ice until cold

–  Strain into a coupe or Nick & Nora glass

–  Garnish with a maraschino cherry

See our Maraschino Cherry Manhattan recipe for our take on the serve, with added cherry liqueur and Luxardo cherry juice.

Both the Manhattan and the Old Fashioned are timeless whisky cocktails—but they deliver different drinking experiences.

The Old Fashioned is the minimalist’s choice: focused, direct and perfect for showcasing your favourite single malt. The Manhattan, with its vermouth and cherry twist, leans more into smooth elegance, making it ideal for dinner parties and polished occasions.

At The Glenlivet, we believe in reimagining classics through a single malt lens. Whether it’s the citrus brightness of our Old Fashioned made with The Glenlivet 12, or the spice and complexity of our Manhattan using the 15 Year Old, both cocktails prove that whisky is more than a drink—it’s an experience.

So, next time you’re deciding between a Manhattan or an Old Fashioned, consider what kind of moment you want to create. And let the whisky lead the way.

Get more whisky inspiration including our favourite Old Fashioned variations, drinks similar to a Manhattan, and cocktail recipes for beginners.