How to measure in ‘parts’
Normal people measure things in ounces, cups, tablespoons and other recognizable increments. Cocktail people often use “parts” instead, which puts the recipe in the form of a ratio.
A part can be any type of measurement. All you have to do is assign a measurement increment to be a part—for example, one part equals one ounce—then do a little bit of basic math.
Here’s an example of a recipe given in parts:
Margarita
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3 parts