1. Run shelled walnuts and biscuits in mixie till powdered.
2. Pour 1 cup milk in a large vessel, add walnut-biscuit powder.
3. Add cocoa powder, sugar, stir till well blended.
4. Put to heat, bring to a boil stirring continuously.
5. Add remaining milk, bring back to boil, wile stirring.
6. Simmer and boil for 2-3 minutes more.
7. Pour boiling hot milk from one vessel to another, to froth.
8. Repeat 3-4 times till frothy.
9. Pour into heatproof glasses, while still very hot.
10. Top with a small blob of hardened icecream.
11. Top this with the walnut half.
12. Serve immediately.

Making Time : 20 minutes
Makes : 3 servings
Shelf Life : Best fresh and steaming hot