What About the Claims?
Some statements often made about these slabs deserve clarification:
- Keeping food warm: Plausible and historically documented in some homes.
- Proofing bread dough: Possible if the stone was gently warmed, but it was not its primary purpose.
- Heating an entire house: Exaggerated. A single slab stores only a limited amount of heat.
- Saving significant energy in an oven: Keeping a baking stone in the oven may slightly stabilize temperature but also increases preheating time and the energy needed to heat the oven.
- Granite is naturally antimicrobial: Not exactly. Granite is nonporous only when properly sealed. Good cleaning practices are still essential.
- High heat burns off sealants: Incorrect. If a stone has unknown coatings or sealants, it should not be used for food preparation until you know it is food-safe.
Using a Stone Slab Safely
If you have an old stone slab and want to use it:
- Confirm that it is food-safe and free of unknown sealants or chemical treatments.
- Avoid sudden temperature changes, which can crack natural stone.
- Use mild soap and water for cleaning if the stone is intended for food contact.
- If baking, place the stone in a cold oven and allow it to heat gradually with the oven.
Bottom Line
Old stone slabs were practical, durable kitchen tools rather than mysterious relics. They provided cool work surfaces for baking, could retain heat for warming food, and, in some cases, served as baking stones. While modern articles sometimes overstate their abilities, these simple pieces of natural stone remain useful in today’s kitchens when used safely and appropriately.
