Prepare the separate batters acc. to the marble muffins recipe.

Add vanilla cake batter to a loaf tin & bake at 180C for 28-30mins.
In a separate loaf pan bake the chocolate cake at 180C for 28-30mins.

Let cool & demold. Measure with the help of a scale and cut both the cakes vertically into equal halves.

Now place one vanilla half layer on the cake board/plate. Apply some jam on the side. Now place the chocolate half alongside the vanilla cake [along the jam side]. Press gently so the cakes adhere due to the jam.

Now apply jam onto this entire layer, place 2nd chocolate half above the 1st vanilla half & repeat the steps as in step 4. Let it chill for 15 mins in the fridge.

Heat the cream in the microwave for 1 minute & stir in the chocolate. Mix till smooth ganache is formed.

Pour the cooled ganache onto the cake and cover the top and sides properly. Refrigerate for the ganache to set. Serve!