Butter - 2 tbsp
Corn flour - 4 tbsp
Milk - 1/2 cup
Onion - 1 small
Bay leaf - 1 no
Cloves - 2 nos
Pans - 2 hard bottom
Slit (donot cut it fully) the onion into 4. In a pan heat milk add onion bay leaf and cloves. When the milk starts boiling remove from flame cover and let it cool. The flavour of onion, bayleaf and cloves will be infused into the milk.
In another pan add butter and when it melts add the flour and stir constantly till the flour blends with the butter well and no lumps are formed. Cook it till it bubbles.
Remove onion, bay leaf and cloves and add the milk to the butter and cornflour pan. Mix thoroughly untill a paste is formed. Cook again for another 5 to 10 minutes till the sauce is thickened
Alternatively milk an be added without infusing it with onion, cloves and bay leaf.