01 -
In a large heat-safe bowl, whisk the orange gelatin with boiling water until fully dissolved. Stir in the cold water.
02 -
Refrigerate for 15-20 minutes, until the mixture is cool and slightly thickened but still stirrable.
03 -
Sprinkle the dry instant vanilla pudding mix over the thickened gelatin. Whisk until smooth and creamy.
04 -
Return the bowl to the refrigerator for 15-20 minutes, until the mixture thickens a bit more but is not fully set.
05 -
Add the thawed whipped topping and vanilla extract. Fold gently until the mixture is evenly creamy with no white streaks.
06 -
Fold in the well-drained mandarin oranges and mini marshmallows, taking care not to crush the oranges.
07 -
Cover and refrigerate for at least 1 hour, or until softly set and cold. Serve chilled.