Directions:
-In a bowl,add all-purpose flour,cocoa powder,baking soda,baking powder,salt,instant coffee and whisk well & set aside.
-In another bowl,add eggs,caster sugar,brown sugar and beat well.
-Add yogurt,vanilla essence,vegetable oil,milk and beat for 1 minute.
-Gradually add dry ingredients and beat well after each addition.
-Grease 10” round baking pan with cooking oil and place butter paper.
-Now pour batter in prepared baking pan and bake in preheated at 170 C for 45-50 minutes.

Remove the cake from the oven and run a knife around the edges to loosen them from the sides of the pan.
-Transfer the cake to the wire rack and let it cool.
-In bowl,add sugar,hot water and mix until sugar is dissolved & set aside.

Chocolate Ganache:
-In double boiler,add cream,butter,milk chocolate and let it melt.
-In warm water,add instant coffee and mix well.
-Now add dissolve coffee and whisk well.

Assembling:
-With the help of the cake knife, cut top layer of the cake from the center and shape it like a donut.
-Pour prepared chocolate ganache all over the cake and let it set for 30 minutes.
-Decorate the top center part with Mango chunks and cut into desire slices and serve the fluffy cake.