Preheat oven to 180 degree C. Line a 9x13 inch rectangle baking pan with parchment paper and set aside.
Take flour, salt, baking powder in a bowl and mix well.
Take butter and sugar, vanilla in a bowl. Whisk till creamy.
Add in eggs and beat well.
Add in third of the flour mix and some milk and beat till combined.
Add remaining flour in small addition and mix everthing till creamy.
Divide the batter into three portions.
Add few drops of pink colour in each batter so it creates different shades of pink colour.
Spoon each batter in the prepared baking pan and bake for 12 to 15 mins. Remove and cool it down.
Now use a round cookie cutter and cut rounds. Set aside.
Now take sugar, water in a sauce pan and boil it. Now add few drops of extract and mix well.
Now take the darkest colour of the cake in the bottom, brush some simple syrup on it and top with some whipped cream. Now top with the lighter shade cake and repeat the same. Now decorate the top of the cake with piped whipped cream.