Short for malted grain - the main ingredient of beer after water. A cereal grain, usually barley, that has been soaked then dried. The soaking causes the grain to germinate, developing enzymes necessary to convert the grain's starches in to fermentable sugars.

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Does a malt “late addition” affect OG?

I'm following a recipe from a book for an IPA that calls for the following (simplified) steps: Boil water (3G/11L) Add Light DME (1lb/450g) & return to boil Add hops At 45 mins, add LME ...