These sophisticated squares are a far cry from the jello shots you had in college. They’re not very sweet, so if you’d like them sweeter, use demi-sec sparkling wine. The Pop Rocks® pop immediately once they’re wet, so serve them on the side, to be sprinkled on right before eating.
Lightly oil an 8- by 8-in. baking pan. Pour pomegranate juice into a 1-qt. liquid measuring cup or medium heatproof bowl and sprinkle with 2 packets gelatin. Let sit until softened, 3 to 5 minutes.
Pour 1/2 cup boiling water over pomegranate-gelatin mixture and stir until gelatin is dissolved. Stir in vodka.
Pour pomegranate-gelatin mixture into pan. Chill until set, about 3 hours.
Pour 1/2 cup sparkling wine into a 1-qt. liquid measuring cup or medium heatproof bowl and sprinkle with remaining 2 packets gelatin. Let sit until softened, 3 to 5 minutes.
Pour 1/2 cup boiling water over sparkling wine–gelatin mixture and stir until gelatin is dissolved.
Pour sparkling wine–gelatin mixture over pomegranate-gelatin mixture, then pour in remaining wine. Chill until set, at least 4 hours or overnight.
Cut gelatin in pan into 1-in. squares. Holding a baking sheet on top of pan, flip pan over to release gelatin onto sheet. Carefully transfer shots to a serving tray.
Serve with Pop Rocks® on the side, for sprinkling.
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.