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Best whisky for an Old Fashioned: bourbon, rye and proof
How to choose a whisky for an Old Fashioned: mash bills, rye spice against sugar, wheated softness and dilution, with in-stock bottles and live UK prices.
An Old Fashioned is whisky, sugar, bitters and ice, so the drink is mostly whisky and the bottle you choose decides it. Bourbon must be made from at least 51% corn and aged in new charred oak, which gives a sweeter, rounder drink; rye whiskey must be at least 51% rye, which gives a drier, spicier one. Because stirring with ice and syrup dilutes the spirit, a whisky bottled at 43% to 50% ABV keeps its structure better than one at 40%.
What the drink needs from its whisky
There are three variables: mash bill, proof and oak.
- Mash bill. A high-rye bourbon (bourbon with a large rye share after the corn) or a straight rye puts pepper and dry spice against the sugar. A wheated bourbon, which swaps the rye for wheat, makes a softer, sweeter drink.
- Proof. Ice and syrup add water, so a whisky at 45% to 50% ABV keeps more of its flavour in the finished drink than one at the 40% minimum. That is a fact about dilution, not a reason to chase strength for its own sake.
- Oak. Bourbon’s new charred oak brings vanilla and caramel notes that sit naturally alongside sugar and Angostura bitters.
High-rye bourbon picks
Woodford Reserve: £35.50 at Master of Malt. A 43.2% ABV Kentucky straight bourbon with 18% rye in the mash bill, enough for a gentle spice against the sugar.
Four Roses Small Batch Bourbon 70cl: £33.50 at Master of Malt. A 45% ABV Kentucky bourbon blended from high-rye and low-rye mash bills, so it balances sweetness and spice in one bottle.
Buffalo Trace Bourbon 70cl: £23.99 at Master of Malt. A Kentucky straight bourbon from the distillery of the same name in Frankfort, made with rye as the secondary grain after the corn; the distillery does not publish the proportions. The UK bottling is 40% ABV, so it makes a lighter Old Fashioned than the higher-strength picks on this page.

Woodford Reserve
43.2% ABV · 70cl
from £35.50 4 retailers
£40.45 delivered
Save up to £4.45
Compare prices
Four Roses Small Batch Bourbon 70cl
70cl
from £33.50 2 retailers
£38.45 delivered
Save up to £4.45
Compare prices
Buffalo Trace Bourbon 70cl
70cl
from £23.99 1 retailer
£28.94 delivered
Compare pricesWheated bourbon picks
Maker’s Mark Bourbon: £35.00 at The Whisky Shop. A 45% ABV Kentucky bourbon made with wheat instead of rye as its second grain, for a softer, sweeter Old Fashioned.
Maker’s Mark 46: £34.95 at Hard To Find Whisky. The 47% ABV version of Maker’s Mark, finished with French oak staves, which adds a little more structure to the same wheated profile.

Maker's Mark Bourbon
45.0% ABV · 70cl
from £35.00 2 retailers
£39.99 delivered
Compare prices
Maker's Mark 46 Kentucky Straight Bourbon Whiskey
70cl
from £34.95 2 retailers
£40.90 delivered
Save up to £5.00
Compare pricesStraight rye picks
Rittenhouse Rye ‘Bottled in Bond’ 100 Proof: £35.90 at Master of Malt. A 50% ABV straight rye at 51% rye in the mash bill, the drier, spicier classic. “Bottled in bond” is a US legal term: one distillery, one distilling season, at least four years in a bonded warehouse and bottled at 100 proof.
Sazerac Rye 6 Year Old: currently unavailable. A 45% ABV straight rye, aged six years.
For the classic build, and for the other whisky cocktails, see our best whisky for cocktails guide.
How we chose: check date and coverage
The picks come from the brief’s facts pack, matched to bottles with a current in-stock offer from the UK retailers we check: Master of Malt, Milroy’s of Soho, The Bottle Club, VIP Bottles and Whisky-Online, in our catalogue check of 23 to 28 October 2026. Prices and stock change; the live price on each bottle page is current, and the retailer’s checkout price is the one that counts. Read how we compare prices.

