Prepare the dry rub spice blend by combining the spice blend ingredients in a small bowl.
When you are ready to make your cocktail, combine the gin, sweet vermouth, lime juice, molasses, and a tiny sprinkle of the spice blend in a small glass.
Mix until the molasses is fully incorporated with the other ingredients, and the sugars from the spice blend have dissolved into the liquid ingredients.
Add a few cubes of ice, and stir the mixture until fully chilled.
Strain the mixture into a chilled champagne glass, and serve.