Complex sentence: The mistake was a huge success and the biscuit became established as Grantham gingerbread, known as a white gingerbread because it is not made with molasses or black treacle.
Split into simpler sentences: The mistake was a huge success and the biscuit became established as Grantham Gingerbread. Grantham Gingerbread is known as a white gingerbread because it is not made with molasses or black treacle.