Combine blackberry puree, lemon juice, st germain, vodka and a scoop of Ice into a mixing glass.
Cap, then shake vigorously 20X, until chilled.
Remove cap.
Garnish a chilled martini glass with sugar on half the rim, as shown in the photo.
Double strain drink into the chilled glass.
Smack mint leaf, then float it on top of the drink, as shown in the photo.
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