Don't worry my hamster is the same. He eats all his favourite parts of Harry Hamster mix first and ignores the pellets too. I think this is a common occurrence with muesli style mixes as they can pick and choose what to eat and become a bit fussy!
If you leave them in the bowl eventually she will realise that to get more food she has to eat them; as cypher says the biscuits and pellets are healthy parts of the mix that keep it nutritionally balanced.