I have searched many profiteroles recipe in the net some of them are pretty straight forward and some of them adds cornstarch. i have made profiteroles before and I never add cornstarch, can someone tell me what the effect of cornstarch can be in the final output?
Profiteroles with cornstarch.
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I did a quick search and found many profiterole (pate a choux) recipes, and the only inclusion of cornstarch is in the pastry cream, not the choux. There is no reason to add cornstarch to pate a choux, and I would imagine the inclusion of it would make the dough only more gelatinous, which may add some structure, but that is just speculation on my end.
I agree with Chef Peon. I don't know why you'd want to add cornstarch to the choux paste. In the pastry cream, yes. One of the best profiterole recipes I ever made was from Rose Levy Berenbaum's Pie & Pastry Bible, Cordon Rose Cream Puff Pastry (pate au choux). If you need the recipe, let me know. It's pretty fool-proof.