digestive biscuit
From Longman Dictionary of Contemporary EnglishRelated topics: Food, dishdigestive biscuitdiˌgestive ˈbiscuit (also digestive) noun [countable] DFFa type of plain slightly sweet biscuit that is popular in BritainExamples from the Corpusdigestive biscuit• Miss Devenish, obviously used to these interruptions, offered Dougal another digestive biscuit.