Yes, cake. The Saxons of England used a number of ordeals to test the innocence of people accused of crimes. The idea being that God would protect the innocent, and allow the guilty to be horribly maimed.
You might be tied up and thrown into the nearest river; if you floated you were guilty, and if you sank you were innocent and the testers would do their best to pull you out before you drowned. (In this they were not always successful)
Or you might have to take hold of a red-hot iron bar or put your arm into a pot of boiling water; if the burns hadn't healed in three days you were guilty. (Second degree burns heal in 3-6 weeks. Third degree burns can take months)
And then there was ordeal by cake. You eat a piece of cake; if you succeed you're free to go, but if you choke on it... you guessed it, guilty. Apparently indulging in criminal tendencies also makes you bad at eating food.