Soak Blueberry in sugar syrup for 5 days and make a paste.
Separate egg whites and yolk in separate bowl .
Beat egg whites by adding powdered sugar little by little until soft and fluffy.
Beat egg yolk in high speed and add in vanilla essence , honey and vegetable oil.
Pour in the yolk mix into the the egg white and gradually fold in using a spatula.
Mix maida and baking powder and using a strainer ,stain the maida mix into the egg white mix and fold in.
Add the blueberry syrup and fold.
Pour the batter in the prepared tin.
Bake the cake in a preheat the oven @ 180 degrees for 35- 45 mins until a toothpick inserted came out clean.
Icing the cake
Allow the cake to completely cool down.
Make 3 to 4 layers by cutting the cake.
Take a tray and place the first layer. Soak the layer by using sugar syrup.Evenly spread the whipping cream over it and add the blueberry syrup and spread.
Place the second layer cake above it.Repeat the same process for all the layers.
Spoon a large dollop of whipping cream onto the centre of the cake.Use a spatula/Pallette knife to paddle the icing to the edges of the cake.For the sides, use the spatula/ palette knife to smear smaller amounts of icing in sections, turn the cake and repeat.
Recipe by Kerala Cooking Recipes at https://www.keralacookingrecipes.com/blueberry-cake/