I used the Hand of Fate spell to call in a golden cookie while the Grandma's were angered, and the spell was successful. When I clicked the golden cookie however, I got a clot. Given that it wasn't a wrath cookie, I assume it's a glitch, but I do not know for sure.
UPDATE: I've confirmed it to be a glitch. I've activated the elder pledge, but the successful casting of the Hand of Fate still game me a Clot. On the bright-side, if I save before clicking the cookie and then refresh, the effect disappears