Prepare the Blackberry Puree: If using fresh blackberries, place them in a blender and blend until smooth. Strain the puree through a fine mesh sieve to remove the seeds if desired.

Measure Ingredients: In a cocktail shaker, add the vodka, triple sec, cranberry juice, fresh lime juice, and blackberry puree.

Add Ice: Fill the shaker with ice cubes, leaving some space to allow for shaking.

Shake It Up: Secure the lid on the shaker and shake vigorously for about 15 seconds. This helps to chill the mixture and combine all the flavors beautifully.

Strain into Glass: Using a strainer, pour the cocktail into a chilled martini glass.

Garnish: Drop a few fresh blackberries into the glass and add a lime wheel on the rim for a pop of color.

Serve and Enjoy: Sip on your delicious Blackberry Cosmo and enjoy the fruity flavor explosion!