The batch that came out wrong
r/Sourdough had to write "Include recipe - no low effort posts" into its rules and r/espresso's help threads carry the machine model in the title — both communities have institutionalised the one thing no product does: read the wreck plus the specific oven or grinder in front of this person and hand back changed numbers
Who is in pain, and how much?
Someone follows a recipe, the cake sinks or the crumb is wet, and all they hold is one photo and a sentence about what they did. The knowledge exists in abundance — the Chinese top answers are 2651-, 3476- and 2516-like general checklists on why chiffon collapses — but a general checklist cannot reach the layer that decides the answer: the machine on their counter. In the Chinese thread the crowd's conclusion is literally 'stop trying, buy a second oven'. The cost is counted in ingredients, not dollars: 真是心疼我的鸡蛋.
What is missing today?
Both sides have institutionalised the missing input rather than filled it. r/Sourdough made 'Include recipe - no low effort posts' rule six, i.e. the community forces you to supply the process because diagnosis is impossible without it — and then leaves the diagnosis to whoever wanders by. The wandering is the second half of the gap: on the top-voted 'What went wrong?' thread in r/Baking (3461 points / 513 comments) the number-one comment with 5738 points is a joke about hiding valuables in the hole, and the real answer about degassing and shaping sits underneath it. Recipe apps generate recipes; nobody reads a wreck.
What would kill it?
Diagnosis from one photo plus self-reported process is genuinely hard and a confident wrong answer wastes another batch, which is exactly the trust this person has already lost. Frequency is real but seasonal, and the category is adjacent to a graveyard of recipe apps with no retention. The honest scope is narrow — one pastry family, one failure mode — and anything wider reads as another AI chef.
What would you do differently?
One category only: chiffon and castella, the two that fail most. Input is a cross-section photo, the recipe as written, the actual machine (steam-combi, convection, deck, rice cooker) and three yes/no questions. Output is not an explanation but a rewritten recipe with the numbers changed — upper/lower heat 160/140, do not open before minute 28, stop whipping at this stage — with every line that is specific to that machine flagged as such. No community, no logging. Cold start (Chinese): 小红书 搜 戚风 塌陷 / 缩腰 求助, answer in the comments with a free one-page corrected recipe; Cold start (English): the 'what went wrong' threads in r/Baking and r/Sourdough, one free diagnosis per thread.
What did real people actually say?
Verbatim from the public sources linked above, not paraphrased: “做了两次都失败不但出炉就塌陷里面还是湿湿的，按照150度烤了1个小时，有没有大佬教教我，每次做都失败是真的心疼我的鸡蛋” — 小红书《崩溃了！！各位烘培大师里面请》238 条评论，发帖人自述 “蒸烤一体机就不要烤戚风蛋糕了，我已经试验无数次了，就没有成功过（开一条缝也不行）。后来为了烤戚风我又买了一台平炉烤箱” — 同帖评论 8 赞 / 23 条回复 —— 通用清单答不到「你那台机器」时，结论就是再买一台 “My starter is 16 days old today. It had been looking bubbly and active for the past 4 days so I decided to try and bake for the first time and see what happened.” — r/Sourdough《Y'all, please don't drag me lol. What went wrong?》207 points / 88 comments
How much work is it?
about two weeks of work
Where does the evidence come from?
https://old.reddit.com/r/Baking/comments/1pevqqj/what_went_wrong/ https://old.reddit.com/r/Sourdough/comments/1quht79/chilli_oil_sourdough_why_didnt_it_rise_properly/ https://old.reddit.com/r/Sourdough/about/rules https://www.xiaohongshu.com/explore/69144afe000000001b03143a
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