
Ginger bitters is a high-proof aromatic bitters built around fresh ginger, giving a sharp, pungent bittersweet edge.
Ginger heat and a bitter finish arrive together here, and that pairing is what a substitute breaks: the heat is easy to find elsewhere, the concentrated bitterness is not.
Fresh ginger, muddled
The heat without the bitter finish or the alcohol, and it brings juice and fiber with it; a coin-sized slice stands in for two dashes; the drink needs double-straining afterwards.
Ginger syrup
Ginger arriving with sugar attached, in milliliters rather than dashes. A barspoon covers two dashes of heat and sweetens the drink, so the syrup in the build comes down by the same amount.
Gingerol and its relatives are stable compounds, so this keeps its heat and its aroma for years. The only thing to watch is sediment: ginger extract can throw a fine haze in the cold, which is harmless and disperses when the bottle warms.