Mix cornflour and milk powder in 1 cup milk and keep aside
Boil 1 ltr milk in a heavy bottom pan ..after the 1st boil put on low flame .Now add the cornflour paste and sugar and keep stirring contiuously to avoid getting lumps ..
Boil for 4-5 mins.Remove from fire n cool ..freeze it for 3-4 hours..
Take the mixture an beat it well with a beater..till it is fluffy and smooth..Now add the strawberry paste and essence and beat again for few mins..freeze till it is set...