Sentence:  Here and elsewhere the <WSD>sérac</WSD>, which is something between curd and cheese, may be advantageously taken instead of butter, which is almost always bad. 
Meaning of the word marked with <WSD> tags:  "Often" '''(sérac)''': a hard, cone-shaped, pale green, strongly flavoured cheese from Switzerland made from skimmed cowmilk and blue fenugreek ((ver=180116)); Schabziger, Sapsago. It is usually eaten grated, mixed with butter, or in a fondue.