Definition of riddle cake in US English:

riddle cake

noun

English Regional, Northern
  • A kind of leavened bread or cake made from oatmeal, the dough for which is often riddled or shaken to make it expand before baking.

Origin

Late 17th century; earliest use found in John Ray (1627–1705), naturalist and theologian. From riddle + cake. With the semantic motivation of the first element, compare discussion at riddle bread.

Pronunciation

riddle cake

/ˈrɪdlkeɪk/