rainbow ribbon cake

so this cake might not be actually filled with rainbows and smiles, but it will probably make everyone happy. 

Total time: 5 hrs 35 mins 

Prep: 40 mins 

Inactive: 4 hrs 15 mins 

Cook: 40 mins 

Makes: 10 servings 

Level: easy 

Ingredients: 

for the cake:

1 box white cake mix ( betty crocker) 

1 1/4 cup water 

1/3 cup canola oil 

3 egg whites 

1/2 tsp vanilla extract 

1 tbsp each flavoured gelatine: lemon, orange, cherry, grape, line and blue raspberry 

2 cups boiling water

for the decoration: 

2 cans of white icing

colour gels: yellow, orange blue, green, purple and red

Method: 

for the cake: 

1. preheat oven to 180 degrees V. spray cake pans with cooking spray. 
2. in a large mixing bowl, beat together the cake mix, water, oil, egg whites and vanilla on low speed. 
3. divide batter between the two tins evenly and bake in oven for 32-36 minutes or until its cooked. cool down slightly in the pans and then turn onto cooling racks. trim the top of the cake until smooth. 
4. place 1 tbsp of each flavour of gelatine in separate small bowls, stir in 1/3 cup boiling water into each and stir until dissolved.
5. on the trimmed sides , splash the different gelatine all over the cakes, cover the cakes, separately, with plastic wrap and refrigerate for 3 to 4 hours 

for the decoration: 

1.remove the cakes from the fridge, unwrap the cakes and place 1 cake on a plate or stand and spread white icing on top and then place the second layer on top, ice the top and sides. 

2. randomly place big dollops of the colouring all over the cake. 

3. use a small spatula, twirl the dollops together to create a tie-dye rainbow effect on the cake