Are you doing a cereal mash with the weetabix, or assuming that since it was cooked it's a lot like flaked wheat, maize, oats, and is pregelatinized? I love weetabix, but didn't consider it for a beer ingredient.
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I assumed that ,since it was made into those flake things that it has already been gelatinized. I added it to the mash to make it soft, disolve the malt extract in the weetabix and also to allow the mash to finish the starch conversion just in case.
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