Add vodka, black raspberry liqueur, and pineapple juice to a cocktail shaker.
Fill the shaker with ice and shake vigorously for 10–12 seconds until well chilled.
Fine-strain into a chilled martini glass.
Garnish with a pineapple wedge on the rim or float a single raspberry in the center of the drink.
The frothy, mousse-like foam that crowns a well-shaken French Martini comes from the natural bromelain enzymes in fresh pineapple juice - a great reason to always use fresh or cold-pressed rather than shelf-stable juice.
My Bar Shelf reads your shelf and shows you every cocktail you can make from what you already own, including French Martini.