From Longman Dictionary of Contemporary Englishldoce_228_amuffinmuf‧fin /ˈmʌfɪn/ noun [countable] 1 DFFa small, usually sweet cake that sometimes has small pieces of fruit in it blueberry muffins2 
British EnglishDFF a small thick round kind of bread, usually eaten hot with butter SYN English muffin American English
British EnglishDFF a small thick round kind of bread, usually eaten hot with butter SYN English muffin American EnglishExamples from the Corpus
muffin• Until recently, it was just bagels, muffins and that sort of grab-and-go-fare.• blueberry muffins• Just the opposite is true with cake, muffin or quick-bread recipes where too much gluten will toughen the finished product.• Spoon the mixture into 10 deep muffin cases.• You can make lots of different muffins from the basic mixture above.• We seated ourselves and I watched her cut her muffins into quarters.• If it comes out clean there is a good chance the muffin is cooked.• Let the muffins cool in the pan for at least fifteen minutes and then for another fifteen minutes out of the pan.• As before the table was laid out for tea, but instead of bread and butter there were toasted muffins oozing butter.Origin muffin (1700-1800) Probably from Low German muffen “cakes” 