"Oooookay, the 'living brains' part definitely complicates things, but I appreciate that you wouldn't wish a slow, painful death on me! That's nice of you." She means it, she'll take what she can get! "I don't want that for you either, that would be awful. We can figure this out."

That's the optimism talking, she's coming up a little short on ideas, especially since dead brains are ruled out. Aren't brains considered a delicacy in some countries? Hmm. Until Doreen gets a chance to sit down and research Phenylalanine, she's kinda flying by the seat of her pants here.

"... But while we're figuring this out, any milkshake flavour preferences? Because I can't get you any brains, but I can buy you a milkshake. Maybe we can find... vitamin supplements or something to even out the difference for ya."