Preheat the oven to 350℉, grease and line 2X8-inch or 3X6-inch pans. Set them aside.
Sift all dry ingredients and set them aside.
2½ cups All-purpose flour, 1 tablespoon Cornstarch, 3 teaspoon Baking powder, ½ teaspoon Salt
Mix milk and buttermilk in a bowl and set aside.
1 cup Milk, ¼ cup Buttermilk
Whisk the oil, eggs, and vanilla extract for 2-3 minutes using the whisk attachment.
½ cup Oil, 3 Eggs, 2 teaspoon Vanilla extract
Add the sugar and keep whisking. Next, add the sour cream and whisk well.
2 cups Granulated sugar, ½ cup Sour cream
Start adding the dry ingredients alternating with the milk mixture. Start and finish with dry ingredients. This will be three portions of dry ingredients and two portions of milk mixture.
Pour the batter into the prepared pans and bake for 25 to 35 minutes. Let the cakes cool in the pan for 10 minutes, flip them onto the cooling rack and let them cool completely.
How to Make The Buttercream
Beat the room-temperature butter until it is soft and creamy and much lighter in colour.
1 cup Butter
Add the powdered sugar in ¼ cup additions, and beat after each addition.
3 cups Powdered sugar
Add vanilla extract and beat well.
1 teaspoon Vanilla extract
Add two tablespoons of heavy cream and mix well. If the buttercream is too dry, add more cream. If it is too runny, add more powdered sugar. Each powdered sugar brand works differently.
2-3 tablespoon Heavy cream
Add one drop of blue food colouring and a touch of yellow colour to get the desired Robin Egg Colour.
1-2 drops Gel food colouring
Frost the cool cake layers. Mix the Nescafe powder in one tablespoon of hot water to create a thick and dark brown mixture. Dip a clean toothbrush into the coffee mixture and squirt the coffee on the frosting to get the Robin Egg look.
1 tablespoon Nescafe powder
Toast the shredded coconut in the toaster oven. Keep an eye on them. They burn quickly.
2 tablespoon Shredded coconut
Spread the shredded coconut on top of the cake and top it with mini eggs.