“An unturned cake”
Ephraim mixes with the nations; Ephraim is an unturned cake. (Hosea 7:8 BSB)
What it sounds like today
A confusing kitchen comparison about a pancake.
The cultural key
The image comes from everyday baking. A flatbread or cake was cooked on a hot stone, a griddle, or in the ashes of a fire, and it had to be flipped partway through; a cook who failed to turn it left it scorched black and inedible on the underside while the top stayed pale and raw, uncooked dough, half-burnt, wholly ruined. That is Hosea's picture of the northern kingdom (Ephraim): 'mixed in' with the surrounding pagan nations and their ways, and never 'turned', half-baked in its faith, done on one side and raw on the other, thoroughly spoiled and good for nothing. There is likely a pun as well, since the Hebrew for 'turn' is bound up with 'return' and 'repent'; Ephraim is a cake that was never turned by a people who never turned back to God. Read as a random cooking simile it is baffling; understood as a griddle-cake nobody flipped, it is a sharp verdict on a half-hearted, ruined people.
Recovered meaning
An unturned griddle-cake burns on one side and stays raw dough on the other, ruined and useless. Ephraim, mingled with the pagan nations and never 'turned' back to God, is that half-baked, spoiled cake, likely a pun on turning and repenting.