Yum Yum Cookstar appears to have been made as some kind of contingency over Cooking Mama: Cookstar's legal disputes, being made by the same developers and publishers and having gone on sale on Steam a mere week before Cooking Mama: Cookstar was withdrawn from sale. While it is not known to what extent Yum Yum Cookstar is based on Cooking Mama: Cookstar, it does have a substantial difference in gameplay, having a psuedo-rhythm element that does not exist in the latter game.

Some prints of the box art have a printed sticker noting the game's connection to Cooking Mama: Cookstar, in spite of the controversy. The official website, TikTok account, and trailers for Yum Yum Cookstar proclaim the game to be made by "the creators of the best-selling hitgame[sic] Cookstar" (without acknowledging the Cooking Mama series by name) and use the slogan "This ain't your mama's kitchen!". The veracity of the claim of the first Cookstar being a best-seller is not known as sales figures have not been released.