Preheat the oven to 180 degrees Celsius. Prepare the cake pans by greasing them with butter and flour to make sure that the cake does not stick while baking.
Prepare the buttermilk by adding vinegar to the milk and let it sit for 10 minutes.
125 ml full-fat milk, 1 tbsp vinegar
Once the buttermilk is ready, add the remaining liquid ingredients - oil, egg, and vanilla essence in the same bowl and whisk until lightly combined.
1 egg, 1 tsp vanilla essence, 60 ml neutral oil
In a bowl, combine all your dry ingredients: flour, white sugar, brown sugar, baking powder, baking soda, and salt using a hand whisk.
120 gs all-purpose flour, 100 gs white granulated sugar, 100 gs packed brown sugar, 1 tsp baking powder, 3/4th tsp baking soda, 1/2 tsp salt
Add the liquid ingredients to the dry ingredients and whisk until everything is well combined.
In a separate bowl, mix the cocoa powder and coffee powder with hot water until combined. This allows the chocolate and coffee powder to become more pronounced in the cake.
38 gs cocoa powder, 1 tsp coffee powder, 125 ml boiling water
Pour the chocolate water mixture into the batter and keep mixing until the water is well incorporated.
Pour the batter into your cake pans and bake for 20 mins or until a test toothpick comes out clean. Let the cake layers cool before assembling.