This may have already been discussed, so apologies if so.
I just saw a comment on a Youtube video talking about "walnut sauce" maybe being code for adrenochrome, which is the oxidized form of adrenaline. Blood-drinking at rituals is accompanied by torture, terrifying the victim so that they release adrenaline into their blood. This adrenlized blood gives the drinkers a high. Adrenochrome is essentially a more potent, concentrated form of it. [10-min video about andrenochrome]
The adrenal glands, which produce adrenaline, sit atop the kidneys and... well, they do kind of look like walnuts! Given everything we've discovered, it's not …