Ingredients
Gelatin Layers
- 6 boxes (3 ounces each) Jell-O: strawberry (or raspberry or cherry), orange, lemon, lime, blue raspberry, and grape flavors
- 2 boxes unflavored gelatin (about 14 teaspoons total)
- 8 cups water (boiling and cold as needed)
Milk Layers
- 1 (14-ounce) can sweetened condensed milk
Others
- Cooking spray (for greasing baking dish)
Instructions
- Prepare the Pan: Spray a 9x13 inch baking dish lightly with cooking spray to prevent the gelatin from sticking and for easy removal later.
- Make Grape Gelatin Layer: In a small bowl, combine the grape Jell-O powder with 1 teaspoon of unflavored gelatin and 1 cup of boiling water. Stir until all the gelatin is fully dissolved. Pour this mixture evenly into the prepared baking dish and refrigerate for 20-30 minutes until it is completely set.
- Prepare Milk Gelatin Layer and Next Colored Layer: While the purple layer sets, dissolve 2 teaspoons (one packet) of unflavored gelatin in 1 cup of boiling water. Mix in about ⅔ cup of sweetened condensed milk from the can. Let this milk gelatin cool to room temperature. Meanwhile, prepare the next flavor of colored Jell-O in the same manner as the grape layer with 1 teaspoon unflavored gelatin and 1 cup boiling water; allow to cool slightly so it will not melt the set layer.
- Add Milk Layer Over Grape Layer: Once the grape gelatin is set and the milk mixture has cooled, gently pour about ½ cup of the milk gelatin over the grape layer. To avoid craters, either tilt the dish or pour the milk gelatin over the back of a spoon carefully so it spreads evenly. Chill the dish in the refrigerator for another 20-30 minutes until this milk layer is firm.
- Alternate Layers: Repeat the process, alternating a colored gelatin layer with a milk gelatin layer using remaining Jell-O flavors and prepared milk gelatin layers. Prepare the milk gelatin in two halves to avoid it setting before pouring. If it firms too quickly, gently warm it in the microwave for 10-15 seconds and stir until it returns to liquid form, then cool again before layering.
- Chill and Serve: After all layers are completed and set, cut the rainbow gelatin into 1 to 2-inch squares. To release the gelatin easily from the baking dish, run hot water briefly over the bottom of the dish for 10-15 seconds before serving.
Notes
- Use the back of a spoon while pouring milk gelatin layers to avoid indentations in the set gelatin.
- If milk gelatin thickens before pouring, gently reheat in short bursts in the microwave to liquefy.
- This dessert requires patience due to setting times between layers, so plan at least 4 hours or overnight chilling.
- You can substitute any flavors of Jell-O for variety or personal preference.
- Lightly spraying the pan ensures easy removal and clean cuts of the gelatin squares.
- Prep Time: 20 minutes
- Cook Time: 4 hours refrigerated setting time
- Category: Dessert
- Method: No-Cook
- Cuisine: American