*apple pie*

A pie made of apples (usually sliced or stewed) with spice and sugar. [ 1913 Webster ]

Apple-pie bed, a bed in which, as a joke, the sheets are so doubled (like the cover of an apple turnover) as to prevent any one from getting at his length between them. Halliwell Conybeare. --
Apple-pie order, perfect order or arrangement. [ Colloq. ] Halliwell. [ 1913 Webster ]