1 (6 ounce) package cherry-flavored gelatin (such as Jell-O®)
1 cup boiling water
1/2 cup vodka
1/2 cup chocolate liqueur (such as Godiva®)
Arrange twelve 2-ounce plastic cups on a baking sheet that will fit in the refrigerator.
Empty cherry-flavored gelatin into a bowl; whisk in water slowly until gelatin is dissolved. Mix in vodka and chocolate liqueur.
Pour gelatin mixture into the plastic cups.
Refrigerate gelatin mixture until set, at least 4 hours and preferably overnight.