It would be nice if there was a way to mark certain recipes in the crafting interface for the Cooking Table so I can easily find my most commonly crafted foods without having to find them each time I visit my kitchen. The marked recipes could either always be at the top of the recipe grid or have a tab on the right of the window that filters them.

ah, yes, that would be practical. I personally like the yellow star marker, and I would prefer them to stay on top rather than separates, so the sorting options could still be used on the favorites, just in top of the other recipes.

Thinking of ALT+Click to (un)favorite and a yellow star icon (like in Terraria). Not sure yet if they should always be on top or if there should be a new sorting option for favorites.

Maybe have a button to the side that filters for only favorites? Even have it cycle between show only favorites, favorites on top, and disable sorting by favorites?

Maybe take inspiration from how JEI handles favourites?