As you may know, the recipe rating system is not reliable. For one thing, as changes are made to a recipe, old votes may no longer be relevant. There may be bugs that were fixed, or optimizations to speed up the recipe. It doesn't take too many votes to move a 4.85 score recipe to a 4.35 score.
I know with my own recipes, that some are vastly underrated as they consistently produce points. My "tlaloc hydrophobe" recipe has a 4.7 rating, but is, I think, overrated. My "tlaloc gyre" has a 4.25 rating, yet is a consistent point gainer. "tlaloc rebuilder" also has a 4.25 rating, but is also underrated.
So what recipes (with more than 10 votes) do you think are underrated?