Put biscuit pieces in a jar and grind to make a fine powder.
Transfer biscuit powder in a mixing bowl.
Add milk and make a smooth batter. The consistency of the batter should be slightly thin.
Keep the batter aside meanwhile let’s heat the pan.
Take a pan and put it onto the flame and let it heat for 2 minutes.
To bake the cake take another nonstick pan and grease it with oil all around.
Once the pan is heated add Eno in the batter and stir immediately. Do not wait for otherwise cake will not become fluffy, immediately pour the batter in a greased pan and put the pan onto the heated pan.
Cover the lid and let the cake bake for 15-20 minutes on low flame.
After 20 minutes insert a toothpick and if it comes out clean it means the cake is fully baked.
Let the cake cool down completely.
To make Frosting:
Put whipping cream in a bowl and beat till stiff peaks form.
When the cake is completely cooled down cut into a square shape with the help of a sharp knife.
Cut the square into half to make two cake layers
Now take the one part of the cake, pipe out whipped cream on top, put some chopped cherries and sprinkle choco chips.
Now put again the second layer of the cake, pipe out whipped cream and smoothen it.
Spread whipped cream all around and smoothen it.
Spread some chocolate shavings on top.
Cut into 3 slices.
Make swirls on each slice. Put one cherry on each swirl.
The black forest biscuit pastry is ready to serve.