Yesterday, I got myself two guano-related upgrade cards. One of them says:
Feeding Batterflies a meal worth at least 80 currants makes them poop five guano at once (instead of three guano for a meal worth 100+ currants).
So... what does one feed the batterflies now, if one wants to do it with one click? If this impressive list is complete, there is no item that is worth exactly 80 currants, so disregarding the pumpkin ale, the next cheapest are the Simple BBQ (which requires several ingredient types), and then the Abbasid Ribs. Any other ideas on how to feed following the upgrade?