Just read the label - all ingredients should be listed. If there are any ingredients, no matter how small an amount, that are not readily available in a store (I am thinking of food additives that are still "natural" but only available to commercial food processors) then I doubt you would be able to replicate the bar. Experiment with baking/cooking methods as well as proportions of ingredients. They may not even be baked - rather smashed with a big press. I would think with enough experimenting you could come up with something fairly close to the bar, if not exactly the same.