Do different dishes give more cooking EXP?

I'm trying to max out the party's stats. I rubber-banded my controller while I was at work and maxed Gladiolus' Survival stat. Now I'm working on Ignis' Cooking stat. When setting up camp, does it matter what dish I have him cook, in terms of EXP gained? Do dishes with rarer ingredients award more EXP?

It's actually quite hard to find any information on the amount of XP that each dish gives. From one site, it says that it appears to be random, no matter the rarity or difficulty of the dish.

It seems to be random on which meal gives the most EXP, I created a hard one and got a little bit and a medium one and got almost a full level.

A video and this guide (which references the video) that I found says that the fastest way is to cook Mystery Meat Sushi. It requires only one ingredient, it's cheap to make at 100 Gil a Luncheon Meat, and you can stock up on the meat by purchasing it at the general store in Lestallum. After purchasing some meat, cook at a campfire over and over again. The video description says it should take about 20 minutes to max out.