Single Malt is a type of whisky made from malt, which comes from a single distillery. Single malt is generally associated with single malt Scotch, even though it is also produced in other countries, with nearly flawless results, by strictly following centuries-old recipes.
Under Scotch Whisky Regulations, "Single Malt Scotch Whisky" must be made exclusively from malted barley (although the addition of E150A caramel colouring is allowed) and must be distilled using pot stills in a single distillery. Moreover, it must be aged in oak casks no larger than 700 litres for at least three years.
While, in general, the Scottish model is followed internationally, these restrictions do not apply to the whisky marketed as "single malt" produced in other parts of the world. For instance, the term "single" in relation to whisky is not defined by US legislation and some American whiskies advertised as "single malt" are made from malted rye, as opposed to malted barley.
The taste of single malt whiskies can vary dramatically, as each element of the production process leaves its mark, thus yielding a unique and exceptional product.