(covers information from several alternate timelines)
Scotch was one of the many alcoholic beverages enjoyed by Zefram Cochrane. In April 2063, the night before his historic warp flight abroad the Phoenix, Cochrane, who along with Deanna Troi was already drunk on multiple shots of tequila, poured a glass of Scotch for Troi and himself, telling her it was the "good stuff" - though after seeing her less-than-thrilled reaction (a spectacle which Will Riker, having just discovered her in the bar, very much enjoyed witnessing), he decided it wasn't so good after all and threw the bottle on the ground, almost hitting Riker. The following evening, after the Vulcan survey ship T'Plana-Hath followed the Phoenix back to Earth and made First Contact, Cochrane served Scotch to the visitors, making the beverage the first example of Human cuisine consumed by an (acknowledged) alien race. (Star Trek: First Contact)
In 2153, Arctic Archaeology Team scientist Drake made a bet with Commander Williams about the discovery of a crashed vessel, and won a bottle of Scotch. Unfortunately, he was assimilated by the Borg before he could claim his prize. (ENT: "Regeneration")
Later that year, shortly after Enterprise NX-01 departed from Earth on a heading to Vulcan, Captain Jonathan Archer and Commander Charles Tucker III shared a bottle of Scotch in the vessel's mess hall. At one point, they toasted a round of the drink to Henry Archer. (ENT: "The Expanse")
Montgomery Scott had a refined taste for Scotch. Scott's palate was sensitive enough to tell the synthehol variety from the real thing. Chekov once claimed that Scotch "was inwented [sic] by a little old lady from Leningrad," when Scott attested to Scotch's superiority over vodka. In the alternate reality, Chekov made the same claim to an alien woman at Kirk's birthday party in 2263. Previously, McCoy took a bottle of Glenfiddich Scotch from Chekov's possessions to drink with Kirk, and its existence surprised both as they thought "he only liked vodka". (TOS: "The Trouble with Tribbles"; Star Trek Beyond; TNG: "Relics")
Cromarty Whiskey may also be a form of Scotch.