If I eat a cookie and I put the package back in the cabinet but sometimes I will go back into the cabinet to take out more cookies. Do I have to make a second bracha?
Answer:
No, there is no obligation to make a second berachah.
Because you are eating more of the same product, and because you know your own habit of occassionally taking another cookie, there is no “hesech ha-daas,” and no second berachah is made.
Best wishes.