Making a Rainbow Cake is a lengthy process. It is rewarding at the end when you see rainbow in your plate though. The recipe is divided into three parts; cake, filling, sugar syrup.
Ingredients for Cake:
- Condensed Milk - 12 oz
- Powdered Sugar - 3/4 Cup
- Vegetable oil - 3/4 Cup
- All Purpose Flour - 3 Cup
- Baking Powder - 3 TSP
- Baking Soda - 3/4 TSP
- Milk - 1 and 1/2 Cup
- Vanilla Extract - 3 TSP
- Food Colors
Steps:
- In a mixing bowl, add condensed milk, powdered sugar and vegetable oil. You can use suffola or canola oil as well. As long as oil is not flavorful like an extra virgin olive oil, you can use it in place of vegetable oil.
2. Mix well with a whisker. In only a couple of minutes, you will have a consistent mixture.
3. In a cake mixer bowl, sieve all purpose flour. Add in baking soda, baking powder, vanilla extract and above mixture with only half of milk. Once you start to mixer, at level 2 for two min. Add in remaining milk. At the end, if the batter is thicker then add 1 or 2 TSP milk. The consistency should be thicker than pancake batter. Now divide the batter in 7 separate bowls; around 1/2 cup each. Add 1 to 1 and half TSP of food color in each.
Red, Yellow and Blue are easy. Most of the food colors come in these colors.
For Orange - Use 1 TSP Red + half TSP Yellow
For Green - Use 3/4 TSP Yellow + 3/4 TSP Blue
For Purple/Violet - Use 3/4 TSP Red + 3/4 TSP Blue
For Indigo - Use 1 TSP Red + half TSP Blue
4. Heat up thick bottom pan at least 10 inch wide. Grease with less than 1 TSP of oil. Now pour in batter for each color at a time. Here is red and purple.
5. Cover the pan with lid. Let it cook for 4 to 6 minute at medium-low flame. At around 5 minute do the toothpick taste in the middle of the batter. It should come clean for taking it off the stove.
6. Let all cakes cool off to room temperature. Now refrigerate all for at least 2 hour to a day. I did here for 2 hours. Then you can use circle template to cut in circle shape. Since those are about 1 inch thick, I used bread knife to cut all in exact shape.
- Heavy Whipped Cream - 1.5 Cup
- Granular Sugar - 5 TBSP
- Vanilla Extract - 1 and 1/2 TSP
Method:
- Add all ingredients in cake mixer. Use whisk attachment and whisk on highest setting - i.e. 10 for 2 to 4 minutes, until you have stiff whipped cream.
2. For filling, I use ziplock bag by cutting off one corner.
Ingredient for Sugar Syrup:
- Water - 1 Cup
- Granular Sugar - 1 Cup
Method:
- In a thick bottom pot, mix in water and sugar. Keep the flame medium and continue to stir.
2. Let the sugar dissolve and mixture will become translucent. Continue to stir to bring it to boil. At first sight of boiling, stop the flame. Cool off the syrup come to room temperature. Now add vanilla extract before storing it in air tight container in the refrigerator. It will be stay fresh for upto 3 months.
Now that we have cakes and filling, for assemble, I am using round tray.Start with dusking a bit of all purpose flour. Add a spoonful of filling at the center.
Place Purple cake on the top of filling. Brush it with sugar syrup.
Layer it with filling. Then place another cake; indigo colored cake layer. Repeat applying sugar syrup and then filling before adding blue colored cake layer. Work your way up to red.
You can cover the sides with same filling and top and your cake is ready. Although I choose to use fondant to cover. I made a golden ninjago mask with fondant.
This is how it will look with cut.
Slice is ready to enjoy!