In a medium-sized mixing bowl, combine the orange gelatin with 1 cup of boiling water and stir until the gelatin is completely dissolved.

Add 1 cup of orange juice and 1 cup of vanilla vodka to the dissolved gelatin mixture, stirring well to combine.

Gently mix in 1/2 cup of heavy cream until the mixture is smooth and uniform.

Pour the mixture into small plastic shot cups or silicone molds, filling them about 3/4 full.

Place the cups or molds in the refrigerator and allow the jello shots to set for at least 3-4 hours, or until firm.

Optional: Before serving, top each jello shot with whipped cream and garnish with orange zest or a small slice of orange.