How much bread made of wheat flour mixed with cornflour must I eat for the brocha of netilas yadayim?
Answer:
It is sufficient to eat a kebeitzah of the bread for the berachah.
The kebeitzah size is a shiur of a person's seudah (meal). If one eats a kebeitzah of bread that requires the hamotzi berachah - which of course includes bread that is baked with a mixture of wheat and cornflour - netillas yadayim must be done with a berachah.
Best wishes.
