Muddle the strawberries, 4 large basil leaves, and 1 teaspoon granulated sugar together in a sturdy glass or measuring cup. Stir in 1 1/2 ounces vodka and mix well. Pour the vodka mixture and 1/2 cup strawberry lemonade into a cocktail shaker filled with ice. Shake well.
Pour through a strainer into a short cocktail glass that is 3/4 filled with ice.Optional: pour into a tall cocktail glass half filled with ice, and top with sparkling water.