Preheat oven to 350°F or 175°C
Take two 6 inch cake pan and line them with parchment paper and grease with cooking spray or oil
In a small mixing bowl add instant coffee powder and water; mix well till the coffee powder is well blended with water
In a wide mixing bowl add flour, cocoa powder, baking powder, baking soda, and sugar; combine everything well with a whisk
After the microwaved coffee is cool add milk, oil, and vanilla extract and mix well
Make a dent in the dry ingredients bowl
Add the wet ingredients and sour cream, mix just until all the ingredients are incorporated; avoid over mixing
Avoid over mixing it yields a dense cake
Divide the equal amount of batter between two tins and add
Bake for 29 -33 minutes or until a toothpick/skewer inserted comes out clean
Cooldown both the cakes for 10 minutes and carefully flip the cake on the rack, remove the parchment paper, and allow both cakes to cool completely
How to make chocolate frosting
In a wide vessel add softened butter and beat it well on medium speed until creamy for about 2 -3 minutes
Add confectioners’ sugar, cocoa powder, heavy cream, salt, and vanilla extract
Beat on lowest speed for around 1 minute or until everything is combined well
After the mixture is well combined slightly increase the speed and beat till you see creamy buttercream frosting
Assemble the cake
Add little frosting on the cake board and place the base cake
Use a skewer and make holes around the cake and drizzle a generous amount of chocolate syrup on the entire cake
Add a generous amount of frosting and spread
Place another cake over the base cake
Add a base coat of frosting and refrigerate the came for at least 1 hour
After 1 hour add one more layer of frosting and level; refrigerate
Chocolate ganache
In a mixing bowl add chocolate chips, vanilla extract, salt, and coffee powder; mix well
In a cooking pan add heavy cream and boil in low flame
Cook till the heavy cream turns warm
Switch off before they start boiling
Add it to the chocolate mixture and let it sit for 4 minutes. Let the chocolates get well immersed in cream
Stir well after 4 minutes
In a colander strain the ganache and keep it at room temperature for least 20 minutes and refrigerate for 20 minutes
Ganache drip
Take a spoon and gently add ganache around the cake and add it to the top portion
Refriegatare the cake for at least 2 hours
Decorate the cake according to your preferences and refrigerated until use