'Extrusions' are a cooked biscuit component of muesli mixes. The ingredients and analysis of these extrusions is not known and probably varies between brands of muesli mix. They can be different sizes and shapes because the uncooked mixture is squeezed through a dye before it is cooked Some companies add food colourings so the pieces are brightly coloured, which may increase the visual appeal of the mix to owners.
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