Jacob’s is a brand name for several lines of biscuits and crackers in Ireland and the United Kingdom.
A cream cracker is a flat, usually square savoury biscuit. It is similar to a matzo, but it contains yeast and is typically thicker and approximately 8 cm square.
The name “cream crackers” refers to the method in which the mixture is creamed during manufacture.
They are made from wheat flour, palm oil and yeast, and are commonly served with cheese or other savoury topping such as Marmite or Vegemite.
They are also eaten with butter or margarine or without accompaniment. An average cream cracker contains about 35 kcal. (source)
So can hamsters eat jacobs crackers?
Yes they can as long as they don’t have anything on them.
They are not nutritionally beneficial for them but the can be eaten by hamsters.