Prep the martini glass by crumbling the gram cracker into a powder. I use a spice grinder to get a fine powder. Put the gram cracker crumbs on a flat dish. Rub a slice of lime around the rim then turn the glass over and rub it in the gram cracker crumbles. Drop the slice of lime into the glass.
Pour vanilla Vodka, Triple Sec, Lime Juice, Pineapple Juice, and RumChata into a cocktail shaker over ice. Shake vigorously until cold. Using a strainer pour into the glass and serve.
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