A Study in Brimstone by G. S. Denning (Warlock Holmes #1)
Comedic Holmes pastiche in which Watson is Holmes (an overreaction to the common tendency to turn Watson into Captain Hastings), Holmes is a magician with no discernible investigative talent, Lestrade is a vampire, and the Great Old Ones are gnawing on the edges of reality.
This covers several classic Holmes cases to varying degrees of success on the comedic front, but always with enough interesting nods and twists to canon that the missed jokes aren’t a dealbreaker.
(Rather more disappointing is introducing your only gay character thusly: “He held himself with a feminine reserve and a demure, almost subservient air, yet his upper body bulged with musculature.")
Buffy the Vampire Slayer S2E6 (“Halloween”)
Buffy the Vampire Slayer S4E4 (“Fear Itself”)
Yes, frat boys, please draw random symbols on the floor and bleed on them. Nothing bad could possibly happen.
Stir 1.25 oz. green Chartreuse, 1 oz. gin, 1 oz. Dolin blanc, 0.5 oz. white whisky, 1 bsp. (0.5 tsp.) Luxardo Maraschino, 1 bsp. Amaro Nonino, 2 dashes lavender bitters, and 1 dash Creole bitters with ice. Strain into a chilled cocktail glass. (The original recipe calls for genever rather than gin and whisky, but I’m out of that; it also wanted walnut bitters in addition to the two that I actually own.)
The result is interesting, but it’s on the sweet side and I look askance at any cocktail recipe with that many fiddly ingredients.