Hotel Tango 'Shmallow is a toasted marshmallow-flavored bourbon from Hotel Tango Distillery in Indianapolis. It is bottled at 30% ABV and sells for around $25 per 750ml bottle.
For $25 I recommend keeping a bottle in your home bar. You can easily swap the Hotel Tango ‘Shmallow for recipes that call for simple syrup for some seasonal flair.