Add Lavender sugar to a small plate.

Rim the glass with lemon juice and dip into the lavender sugar. Set aside.

Add all ingredients to a cocktail shaker filled with ice.

Shake well until chilled, about 15 seconds.

Strain into a chilled, lavender sugar-rimmed coupe or martini glass.

Garnish with a few fresh blueberries or a sprig of lavender.

Add all ingredients to a saucepan over medium heat.

Stir occasionally until the sugar dissolves and the blueberries begin to break down, about 5–7 minutes.

Simmer for 5 more minutes, then remove from heat.

Let it cool, then strain through a fine mesh sieve.

Store in the fridge in an airtight container for up to 2 weeks.