Wow, that title always grabs my attention — 'I Get Stronger the More I Eat' sounds like pure comfort-food fantasy energy. I dug through the places I usually check (manga and web novel databases, publisher pages, and a few fan-translation sites) and found that the English phrase is often used as a casual translation rather than an official title, which makes pinning down a single credited author tricky.
What I learned is that works with that gist—someone gaining strength from eating—appear across different mediums and languages, and scanlators or fan translators sometimes pick literal-sounding English titles like 'I Get Stronger the More I Eat'. If you want the original author name, the reliable route is to find the original-language title (look at the first pages of a chapter, the publisher’s page, or entries on sites like MangaUpdates, MyAnimeList, NovelUpdates, or the official webcomic platform). Those entries will list the mangaka/author and artist properly.
So, I can’t point to a single definitive author credited under that exact English phrase without a clear original title or publisher, but tracking down the source through the methods above usually reveals who actually wrote and drew it. Honestly, I love that premise and I’ll keep an eye out for the official credit next time I stumble across it.