For the cake sift plain flour, baking soda, baking powder & cardamom powder. Keep aside.
In a bowl beat the oil & castor sugar well.
Then add 1 by 1 eggs & beat again.
Add the sifted dry ingredients. Mix well by cut & fold method.
Bake for 30-40 minutes in 180 degree c in preheated oven.
Cool completely & rest it for over night.
For sugar syrup boil sugar & water until sugar dissolves well. Cool down completely & keep aside.
For the buttercream frosting beat butter and sugar together until creamy form comes.
Now divide the buttercream in 3 parts & add ur desired food colours. I use green in 1 portion for leaf, deep pink & light pink in the another 2 portions for flower.
Now cut the cake between with cake knife & divide in 2 layers.
Drizzled sugar syrup on the top of the 1 layer. Add some butter cream. Assmble the another layer & again drizsled sugar syrup & add butter cream.
No crumble coat the cake with butter cream & rest it for 30 minutes.
After 30 minutes again cover the cake with buttercream.
Decorare the cake by making some flowers & leaves.