Wash and slice the strawberries. Place them in the cocktail shaker with basil leaves.
Muddle the strawberries and basil gently to release their flavors.
Add vodka, lemon juice, and simple syrup to the shaker.
Fill the shaker with ice and shake for 10-15 seconds.
Strain the mixture into a Collins glass filled with fresh ice.
Top with club soda or sparkling water.
Garnish with a fresh strawberry and basil leaf.
Notes
The drink tastes best with ripe, in-season strawberries. Store-bought strawberries work well during off-season months.Fresh basil adds the most flavor. Dried basil should not be used as a substitute.The simple syrup can be adjusted based on the sweetness of the strawberries.Make it non-alcoholic by replacing vodka with extra club soda.The drink should be served right away while the bubbles are fresh and the ice is cold.