Baking bread with a hot car
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Manifold Destiny: The One! The Only! Guide to Cooking on Your Car Engine! https://www.goodreads.com/book/show/1662735.Manifold_Destiny
Alton Brown was recently asked about this and replied simply: "inedible", but Adam Savage also recently discussed it and said it was cold by the time they got to it, due to "the vagaries of television" but quite edible:
The cookies baked decently but it wasn't hot enough to brown them properly so the flavor was a bit lacking.
A fun experiment to be sure, but not particularly interesting results. Whether or not it's worth reading the entire thread probably depends on how interested you are in repeated updates about how much some dough has risen.
Sorry could not find a link..