Add all the ingredients except the Champagne to a shaker filled with ice and shake.
Double-strain into a chilled coupe.
Top with the Champagne.
Garnish with a lemon twist.
*Honey syrup: Add 1/2 cup honey and 1/2 cup water to a small saucepan over medium heat. (You can experiment and decide how much of a honey flavor you want in your syrup. The more honey you use, the thicker the syrup and stronger in flavor it will be.) Stir until blended. Strain into a jar, and seal tightly with a lid. Will keep for 1 month in the refrigerator.