Horrible disappointment, Lava Cookies and RageCandyBars. Like dog treats that smell like bacon but taste like what poison smells like.
To Pokémon, though, Lava Cookies ought to taste sweet, doughy, but a bit hot and spicy. RageCandyBars I'd imagine would be dark chocolate and protein, so chewy but energizing. Slowpoke Tails taste like delicious meat to both humans and mons. Not that I would eat them.