Cake Fan said:
please post the recipe if you could
I baked cake with the same technique but it was not the rain bow color(There is the recipe in my blog).Another cake I decorated with fondant (rain bow color).
5 large eggs at room temperature
2/5 teaspoons bakingpowder
3cups purpose flour
1cup vegetable oil
2tablespoon cocoa powder
1teaspoon vanilla extract
1drops of red wilton color
You will also need (26cm)nonstick round cakepan
preheat the oven to low temperature
Bake in the oven for about 1.5 hours
In a large mixing bowl, combine eggs and sugar and vanilla, until the mixture is creamy and light in color.Add yoghurt and milk and beat till mix together then add oil and continue beating until well blended.In separate bowl, combine and mix flour and baking powder.Gradually add the flour mixture to the wet ingredients and beat until the batter is smooth.Divide the mixture into 3 equal portions. keep one portion plain ,add cocoa powder into another and red color into another portion.
Lightly grease the pan with oil. Scoop 2 heaped tablespoons of plain batter into the middle of bakingpan.Then scoop 2 tablespoons of cocoa batter and pou it the center on top of the plain batter.Then scoop 2 tablespoons of red color batter and pour it in the center on top of the cocoa batter.Do not stop and wait until the previous batter spreads.Keep going !Do not spread the batter or tilt pan to distribute the mixture.It will spread by itself and till pan gradually. Continue until you finish them.
If you don't want decorate with buttercream or fondant, take a knife and go forward and backward and sign spider .And then bake in the oven. Or if you don'nt want become 3 colors you can use 2 colors (plain and cocoa)then you have to divide the mixture into 2 equal part and scoop 3 tablespoons of batter substitute 2 tablespoons of batter. your oven temperature must be very low and take aroud 1.5 hours to bake.my oven degree has problem .when I bake cake I always use very low temperature.If your oven temperature is high ,inside your cake become raw.
I don't have the rainbow cake at Monginis. But I would like to say I saw your rainbow cake image its really nice.