If you were thinking of , the structure was different. While it featured high-stakes cooking, the central focus of that specific episode was a Japanese Elimination Test (sushi platter) following a team challenge, rather than a standalone Mystery Box.
The search for "[S3E13] Mystery Box Challenge 1" suggests you are likely referring to , where the contestants faced a unique twist in their first major Mystery Box. Episode Summary [S3E13] Mystery Box Challenge 1
Unlike typical challenges where you select a few ingredients, this required the inclusion of every single item. If you were thinking of , the structure was different