Description
Rainbow Jello Cake is a vibrant and colorful dessert featuring layers of brightly colored gelatin over a moist white cake base. This eye-catching dessert is perfect for celebrations and offers a fun mix of flavors and textures with its light cake, jiggly gelatin layers, and creamy whipped topping.
Ingredients
Scale
Cake Ingredients
- 15.25 ounces box of white cake mix
- 1 cup water
- ½ cup vegetable oil
- 4 egg whites, room temperature
Gelatin Layers
- 3 cups boiling water, divided
- 3 ounce box of strawberry gelatin mix
- 3 ounce box of orange gelatin mix
- 3 ounce box of lemon gelatin mix
- 3 ounce box of lime gelatin mix
- 3 ounce box of berry blue gelatin mix
- Red, orange, yellow, green, and blue food color gel (5-7 drops each)
Topping and Garnish
- 8 ounce container of whipped topping, thawed
- Rainbow sprinkles, optional garnish
Instructions
- Prepare the Cake Batter: Preheat the oven as directed on the cake mix box. In a large bowl, combine the white cake mix, 1 cup water, ½ cup vegetable oil, and 4 egg whites. Beat for 2 minutes, then pour the batter into a greased 9×13 inch baking pan.
- Bake the Cake: Bake according to package instructions until a toothpick inserted in the center comes out clean, usually about 25-30 minutes. Remove from oven and allow the cake to cool completely.
- Prepare Gelatin Layers: Divide 3 cups of boiling water into 5 equal parts (about ⅗ cup each). For each gelatin flavor, dissolve one 3-ounce gelatin box in its portion of boiling water, stirring until completely dissolved. Add 5-7 drops of corresponding food color gel to intensify color if desired.
- Layer Gelatin over Cake: Once the cake is fully cooled, carefully pour the strawberry gelatin layer evenly over the cake. Refrigerate until the layer is set, about 30 minutes. Repeat this process sequentially with the orange, lemon, lime, and berry blue gelatin mixes, allowing each layer to set completely before adding the next, refrigerating for 30 minutes after each layer.
- Add Topping and Garnish: After the final gelatin layer has set, spread the thawed whipped topping evenly over the top of the cake. Garnish with rainbow sprinkles if desired for extra festive flair.
- Chill Before Serving: Refrigerate the whole cake for at least 1 hour before slicing to ensure all layers hold together cleanly.
Notes
- Use gelatin food color gels for the most vibrant colors without diluting the mixture.
- Be sure the cake is completely cool before adding gelatin layers to prevent melting the gelatin.
- Allow each gelatin layer to set fully in the fridge before pouring the next layer to maintain clear, distinct layers.
- This cake is best served chilled and consumed within 3 days for freshness.
- For a gluten-free option, substitute the white cake mix with a certified gluten-free cake mix.
