Curd originated in England in the 1800s as lemon curd. Initially, lemon curd was made by adding lemon juice to cream to form curds. The curds were then separated from the whey through a cheesecloth. People often enjoyed Lemon curd spread across bread or scones like a jam. Today, most recipes add eggs and butter, so curd is more of a thick custard than a jam. But it is still delicious on bread or scones.