Food colour - red, orange, yellow, green, blue, and purple gel (or of your choice)
How to Make Multicolored cake:
Preheat oven to 200 degree C. Brush a 9-inch round cake pan, with oil/butter. Line the bottom of each cake pan with parchment paper; brush again and set aside.
Sift the flour with salt and baking powder.
In a bowl, cream the butter and sugar.
Slowly add egg whites and mix, until well combined.
Add vanilla and mix, until fully incorporated.
Add flour mixture and milk, in two alternating additions, beginning with the flour and ending with the milk. Mix, until well combined.
Divide the batter, into six bowls (1 cup each).
Add a different colour to each bowl and mix well.
Assuming you are putting the layers in the order blue, green, yellow, red, orange and purple, take a spoonful of the blue batter and pour into the exact centre of the pan. Now take a spoonful of yellow batter and pour into the centre of the blue batter. Then the red batter goes into the centre of yellow and so on. Repeat the same procedure, till the whole batter is used up.
Always make sure, that you pour the batter carefully into the centre and avoid spilling.
Take a clean toothpick and insert on the inside edge of the pan. Pull the toothpick to the centre and then lift up the toothpick. Clean with a tissue. Continue, till you get the desired flowery pattern.
Bake in the preheated oven for 30-40 minutes or till a toothpick inserted, in the centre of the cake comes out clean. Cool, cut and serve.