This rainbow-colored ice cream is a cool accompaniment to your party cake.
Let the ice cream set out at room temperature for 20 to 30 minutes to soften.
Next, scatter 3 tablespoons of any flavor of powdered gelatin over the bottom of a sealable, medium-size square or rectangular container. Layer one quarter of the softened ice cream over the gelatin. Don't worry if the layer of ice cream is lumpy - it will look better that way.
Scatter 3 tablespoons of a second flavor of gelatin over the first layer of ice cream. Repeat this process, alternating layers of ice cream and flavors of gelatin, until you've used up the ice cream.
Top it off with a layer of gelatin, cover the container, and return it to the freezer for 2 to 3 hours to harden before serving.
To serve the ice cream, transfer the whole block from the container to a plate. To do this, run warm water over the outside of the container or set it in a sink filled with a few inches of warm water for 1 minute, then turn it upside down onto a plate.
To get a nice spiraled serving, scrape an ice-cream scoop or large spoon along the side of the block. Makes 16 servings.