Combine ingredients in saucepan and use a spoon to lightly crush the raspberries.

Bring to a simmer over medium heat. Once simmering let cook for 5 minutes.

Remove from heat and pour into a cup through a fine mesh strainer.

Let cool completely.

Store in the refrigerator for up to 1 week.

Add raspberry simple syrup, cranberry juice, dry vermouth, vodka, and ice to a cocktail shaker.

Shake together for 10 seconds.

use a cocktail strainer and pour the drink into a martini glass.

Garnish with fresh raspberries and serve immediately.