Hi, new here! I've done a lot of fishing and cooking recently and noticed that the complex recipes like Jam, Pumpkin pie, and the bug soup award far less exp, while taking up a lot more cooking spaces.
For example, I can cook 12 random fish and get around 30-36 exp per batch. There's only enough space to cook 2 jams at one time (on the base level pot, with no upgrades) and those 2 jams only award 6-10 exp.
So my suggestion is, since the complex recipes require more items, and are technically harder to make while taking more time, they should award a higher amount of cooking exp. I think bring them to 20 - 25 exp per item would be fair. That way if you cook 2 jams, you'll be getting 40 - 50 exp total for both items cooked. Which is more than just throwing in 12 fish/meat chunks, but isn't too high that it makes them OP.