[imagist]

First of all, that's not how you make a Sazerac. You rinse the glass with absinthe and toss the absinthe, you don't add it to the mix. There's also an ordering dependence: the rye and bitters can be mixed in either order, but adding ice, shaking, and straining should happen in that order with nothing in between, because the longer the warm ingredients are in contact with the ice, the more you're watering down the drink. I'm not going to go so far as to say the lemon garnish is wrong, but an orange peel rubbed on the rim and then garnished is better IMHO.

Second, that's not functional programming, that's calling a library function.