Unexpected small items which make a big difference in a cocktail?

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For me its the cucumber in a Pimm's Cup. I never realized how powerful a flavour cucumber has until I compared a Pimm's with and without a cucumber spear.

Any other places where garnish matters more than you would think?

Submitted July 21, 2015 at 05:00AM by drays http://www.reddit.com/r/cocktails/comments/3e292v/unexpected_small_items_which_make_a_big/