Pumpkin-Spiced Martini Recipe

1 cup ice cubes

1 ½ fluid ounces half-and-half

1 fluid ounce spiced rum (such as Captain Morgan's®)

½ fluid ounce butterscotch schnapps

½ fluid ounce coffee-flavored liqueur (such as Kahlua®)

½ fluid ounce pumpkin pie-flavored syrup (such as Monin®)

1 teaspoon cinnamon sugar

or as needed

2 tablespoons whipped cream

or to taste

1 pinch ground nutmeg