A is for ...

Appletini...

We haven't made this one yet.  Here are a few of the recipes I found.

from here

• 45mL Vodka
• 15mL Apple Schnapps
• 15mL Cointreau

from here

• 1.5 oz vodka
• 1.5 oz green-apple liqueur, such as Sour Apple Pucker 
• 1 oz clear apple juice

and from here

• 50 ml De Kuyper Sour Apple
• 50 ml Vodka

So I guess the two main ingredients are vodka and a sour apple liqueur.  I don't have those on hand so I'll have to add more to my liquor cabinet ...