In a small saucepan, combine 1 cup of water, 1 cup of sugar, and 1 tablespoon of dried lavender. Heat over medium heat until the sugar dissolves completely, stirring occasionally.
Remove the saucepan from heat and let it steep for about 15 minutes. This allows the lavender flavor to infuse into the syrup properly.
Strain the mixture into a container to remove the dried lavender pieces and let it cool completely before using in your cocktail.
Rub a lemon wedge around the rim of a chilled martini glass, then dip it into granulated sugar on a plate to create a sweet coating.
In a cocktail shaker, add 2 oz white grape juice, 1 oz freshly squeezed lemon juice, 1 oz lavender simple syrup, and 1/2 oz triple sec. Fill the shaker halfway with ice.
Shake vigorously for 20-30 seconds until well mixed and chilled. Use a cocktail strainer to pour into your prepared martini glass and garnish with a fresh lavender sprig or lemon twist before serving immediately. Enjoy!