@BattleFranky69:
I'm not sure why the earlier rampage that Jimbei halted with the delivery of cream puffs wasn't stopped sooner, did she just crave that out of the blue and they didn't happen to have any on hand and they would take a while to cook? I would think knowing her temperament they'd keep as much of everything around as possible in the freezer or something in case of sudden maniacal cravings, so at the very least there are occasions where they lack the required food to satiate her even when Sanji isn't around, this is just the most extreme situation since her time in Elbaf. It's uncertain what the change in her palate might be after all's said and done so if no other cooks live up to Sanji's standard, and she doesn't go into a long-term coma after eating the cake, maybe it won't be possible to halt her rampages anymore. But after this one, even the common residents are no longer feeling safe there, so they'll probably all bugger off elsewhere and try their luck surviving outside Yonkou-protected turf. At least then the only people left to deal with her will be her family and subordinates and no innocent bystanders will be in danger again. Come to think, if Big Mom is knocked out by deliciousness, maybe they'll all get the life they had taken away in exchange for safe residence and that will motivate people to move away since they won't have lost anything or had to leave something so important behind.
Big Mom's hunger pangs are like a person's experience of blue balls. You know you and your on-call doctor wife will be having fun tonight, all through the morning she sends pictures and texts that leave your co-workers staring at your crotch, you get home walk through the front door and its dark and there are lit candles, rose petals, and brand new fire extinguishers everywhere, she calls out to you, she's in the bedroom, you go in there, she's wearing these red and black laced lingerie that's edible because tonight is kinky night, and you plan on savoring this moment and this night which manifests in this "it's on" expression you feel your face make and your wife nods "it is", and then she gets called in, emergency at the hospital she's so sorry, she leaves, you're there alone just hating the NRA because all they've done allowed someone to buy guns too easily and kill people hence ruining your night, you can't think of others at this time, and you just want to destroy, specifically, their organization, but would settle for any even a random stranger online, with your bare hands (or words) until you're satisfied but you never will be because destruction wasn't what you wanted in the first place but quality time with your significant other.
This is why having things around doesn't work. It's only when the anticipation rises to its break point (for giant sweets, the puffs, and now wedding cake), and then something out of anyone's control happens and so she never gets to eat like she expected to that the hunger pangs come on.