From David Lebovitz
Add all ingredients except the bubbled to a mixing glass filled two-thirds with ice.
Stir briskly until well-chilled, about 15 seconds.
Strain into a chilled coupe glass.
Add an ice cube and a splash of sparkling cider.
If you can't get the spiced pear liqueur, you could use a good-quality triple sec, orange liqueur (such as Grand Marnier) or another good quality fruit-based liqueur. Be sure to use a slightly larger coupe glass if you have it, since depending on the size of your ice cube, you want there to be enough room for the sparkling cider on top.