Find the Cause of a Chocolate Batch Problem
Start with what you can see, feel, or smell. A grainy melt, a dull set, and a pale film after storage may look like one problem, but they point to different stages of the work.
Fault finding chart
| What you notice | Likely cause | Check or next test |
|---|---|---|
| Stiff and grainy while melting | Water or steam may have entered the chocolate and caused it to seize. | Check the bowl, spatula, and heating setup for moisture. The chocolate can be turned into a sauce by adding liquid, but it will no longer be suitable for a tempered moulded shell. |
| Thick, gritty, and smelling cooked | The chocolate may have overheated or scorched. | Check how it was heated and whether it was stirred between short heating periods. Scorched flavour cannot be removed by tempering again. |
| Set but soft, dull, or streaky | The temper may not have formed the desired cocoa butter crystals. | Remelt and temper a small sample, then check whether it firms with an even sheen before moulding the rest. |
| Grey or white film that feels smooth and smears to the touch | Fat bloom can follow poor temper, warm storage, or temperature swings. | Review both the temper test and the conditions after the chocolate set. The change is chiefly in appearance. |
| Rough, dusty white surface that does not smear | Sugar bloom can follow condensation on the surface. | Check whether cold chocolate met warmer, humid air or whether the storage area was damp. Keep wrapped chocolate protected as it returns to room temperature. |
| Moulded pieces stick or look dull | Poor temper is one possibility. A wet or cold mould can also interfere with the result. | Check that the mould is clean and dry, then test a small amount of chocolate for a firm set before filling it again. |
| Chocolate is too thick to coat or mould cleanly | The recipe may have too little fluidity for the job, or tempered chocolate may have thickened during work. | Check the chocolate's intended use and working temperature. Stir and warm gently if it has thickened in the bowl. |
| Bubbles mark the moulded surface | Air may have stayed trapped after the mould was filled. | Tap the filled mould and compare the next set piece. |
Decide what can be recovered
- Failed temper: remelt and temper again, then test a small smear.
- Seized chocolate: adding liquid can make a sauce or filling, but it changes what the batch can be used for.
- Scorched chocolate: heating has changed the flavour. A new temper will not remove it.
Record the symptom and change one variable on the next test. That makes it easier to tell whether the cause was moisture, heat, the recipe, or the way the chocolate set.