Malt syrup is derived from concentrated pre-fermented germinated/malted barley wort (i.e. liquid extracted from mashing process).
- Sprout grain, e.g. barley
- Mash separation
- Wort boiling
- Flavoured with hops
- Sterilized before storage
Sprouting sweetens grains because of the breakdown of carbohydrate into smaller sugar molecules (nourichedkitchen.com).
Use of malt syrup or extract in beer brewing (beerandbrewing.com).