I always end up with an overstock of Bass and other related normal fish so I just coast off Cooked Fish for my playthroughs. My other potions only last 5~8 minutes anyway, and I'm constantly chugging Regen+Ironskin, so having a stacking ingredient next to my potion materials instead of having to farm pumpkins all the time is way more convenient.
That, and I personally don't even like pumpkin pie. Pecan or bust.
E: Hey man, more pie for you. Don't complain.