Right now, cooking levels past 40 don’t feel very rewarding, aside from unlocking more ovens—which doesn’t really matter as long as you have enough fruit punch. To make cooking more worthwhile, it would be great to have perks that give players a reason to keep leveling up / chase those levels.
For example:
Level 40: 2.5% chance to cook two bone broths instead of one (this could be adjusted or improved at higher levels).
Level 45: 2.5% chance to cook two onion soups.
Level 50: 2.5% chance to cook two Over the Moons.
...
Level 80: 5% chance to cook two red berry/concord grape pies or two breakfast boosts.
Small rewards like these would make the grind to 99 feel a lot more satisfying, especially since cooking is one of the slowest skills to train right now.