Melt butter in a saucepan. In the melting butter add cornflour little by little. Be careful that lumps do not form. Switch off the burner.

Pour milk slowly into this mixture and mix gently.

Place the mixture on low heat, stirring continuously until a thick consistency is obtained.

Add a pinch of pepper powder, mustard powder, sugar and required salt.

Stir and mix the sauce. Your yummy white sauce is ready.

Note:- For cheese sauce, add 4 tbsp grated cheese to the white sauce and stir on low heat until a thick consistency is obtained.