> When a recipe calls for "1 part vodka" and "3 parts..." what
> measurment is this exactly? Help!
If a recipe refers to "parts" then it is just describing the proportion of
each ingredient in the drink. You can adjust the drink to whatever size as
long as you keep the proportions the same.
A simple example is a screwdriver:
-1 part vodka
-3 parts orange juice
=
1 Oz vodka
3 Oz Orange juice
A part usually will be either 1/2 an Oz or 1 Oz for most recipes.
Hope that helps