I personally asked the bartender, and he gave me the ingredients but when I tried to make it at home it didn't taste the same. My husband called back to the restaurant and was told this:

For one sour apple martini:

1 oz of Apple Pucker
1/2 oz of Midori
1/2 oz of Sky Vodka
1 1/2 oz of sweet and sour mix

Shake and serve over crushed ice. It worked and I have saved a fortune.