Quick diagnosis: A cake sinks when its expanding structure cannot set before pressure or heat drops. The centre may still be raw and must be checked.
What the Symptoms Tell You
The rim is set but the centre forms a crater, looks wet or compresses into a dense line.
Why This Usually Happens
The most common causes are connected to temperature, ratio, timing, ingredient condition or technique. Compare the dish with these specific checks:
- The oven door opened before the structure set.
- Too much leavener, liquid or incorporated air expanded then collapsed.
- The centre was underbaked or oven temperature was too low.
Professional Rescue Method
- Check the centre for complete baking before serving.
- Trim and layer a fully baked but sunken cake with filling.
- If the centre is raw, continue baking only when immediately safe and likely to finish without burning.
Safety and Quality Limit
Do not serve raw batter, especially where egg or flour remains uncooked. Discard if correction would leave the cake in unsafe conditions.
Prevent It Next Time
- Measure leavener accurately and avoid over-aerating.
- Preheat fully and keep the door closed during early baking.
- Match pan depth and verify doneness in the centre.
Chef’s Verification Test
A clean probe from the deepest centre should show set crumbs rather than wet batter.
Use this guide as general culinary education. Follow local food-safety rules, allergen controls and equipment manufacturer instructions.