 *Photo: Unsplash*
Montreal's home pizza culture exploded during the COVID lockdowns of 2020 and 2021 when restaurants were closed and thousands of households discovered that a good pizza stone, a hot oven, and fresh dough from Jean-Talon Market could produce results rivaling the Neapolitan pies at Elena in Mile End or the wood-fired slices at Chez Tousignant on Duluth. Four years later, the pizza stone is a permanent fixture in Montreal kitchens — and one of the most misunderstood pieces of bakeware when it comes to cleaning.
The cardinal rule is simple but counterintuitive: never use dish soap on a pizza stone. The porous cordierite ceramic that makes a pizza stone so effective at absorbing and distributing heat also absorbs liquid detergent permanently. One soapy wash leaves a chemical residue baked into the stone's pores that transfers a bitter, soapy taste to every pizza you bake afterward. Unlike a pan, a pizza stone cannot be "rinsed clean" — soap that enters the pores cannot come back out.
This guide covers the correct no-soap protocol, how to remove hardened cheese and burnt sauce, when and how to use the burn-off method, and the Montreal-specific factors — hard water, high summer humidity, and apartment oven types — that affect how you maintain your pizza stone.
---
Why Pizza Stones Need a Different Cleaning Approach
Most bakeware is non-porous: stainless steel, tempered glass, aluminium, and coated non-stick surfaces do not absorb what you put on them. Cordierite, the mineral ceramic used in virtually all quality pizza stones (Lodge, Old Stone Oven, UNICOOK, Weber), is engineered to be porous for a reason. Those microscopic pores absorb moisture from dough during baking, producing the dry, crispy crust that makes pizza-stone pizza different from sheet-pan pizza. The same porosity is what makes soap-cleaning permanently damaging.
Three things you must never do to a cordierite pizza stone: 1. No soap or detergent — absorbed into pores, cannot be removed, taints food permanently 2. No soaking or submerging — stone absorbs water deeply; when reheated, the trapped water turns to steam, expanding rapidly inside the stone and causing cracks or full breakage 3. No cold water on a hot stone — thermal shock from a large temperature change is the fastest way to crack a pizza stone. Always let it cool completely before any contact with water
---
After Every Use: The Standard Cleaning Routine
The best time to address pizza stone residue is after the stone has cooled completely — minimum 30 to 60 minutes in a turned-off oven, then another 10 to 15 minutes on the counter until you can hold it comfortably with bare hands.
Step 1: Dry-scrape loose debris. Use a plastic bench scraper, a stone scraper (often included with the stone), or the back of a butter knife to scrape off loose cheese, crust fragments, and burnt toppings. Never use a metal scraper — it scratches the surface and accelerates uneven wear.
Step 2: Brush off fine particles. A stiff nylon brush (not wire) or a dry vegetable brush works well here. Brush debris off the surface into the sink or a bin. No water yet.
Step 3: Spot-treat any hardened residue. For cheese or sauce that has carbonized onto the surface: make a thick paste of baking soda and water (roughly 1:1 ratio). Apply directly to the hardened spot, let it sit for 5 to 10 minutes, then scrub gently with the nylon brush. Wipe away with a barely damp cloth, then immediately dry the stone with a dry towel. This is the only situation where a small amount of moisture is used — applied locally, wiped immediately, and followed by thorough drying.
Step 4: Let the stone air-dry completely before storing. In Montreal's summer humidity (70–80% RH from June through August), a pizza stone with any residual moisture stored in a cupboard or placed in a sealed bag will develop mold or musty odors within 24 to 48 hours. Always store the stone in a place with airflow — leaning it upright against the inside of the oven (off), placing it on an open shelf, or resting it flat on the oven rack with the oven door slightly ajar for 30 minutes after cleaning.
---
The Burn-Off Method: For Heavy Residue and Odors
If the stone has significant built-up residue, absorbed odors from previous baking sessions, or patches of old carbonized material that won't scrape off, the burn-off method is the most effective solution — and it requires no water at all.
How it works: 1. Place the pizza stone in a cold oven, directly on the center rack 2. Set the oven to its maximum temperature — typically 260°C (500°F) for most Montreal apartment ovens, up to 315°C (600°F) for some gas ranges 3. Once the oven reaches temperature, leave it running for 1 full hour 4. Turn the oven off and leave the door closed; let the stone cool completely inside (1 to 2 hours) 5. Once cool, scrape and brush off the white ash residue that remains
The burn-off method works because organic residue (oil, cheese protein, tomato sauce, dough) carbonizes and turns to ash at high temperatures. The ash brushes off cleanly. This is exactly how self-cleaning oven cycles work, and it is safe for cordierite stones rated to 538°C (1,000°F) or above, which includes Lodge, Old Stone Oven, and UNICOOK models.
Montreal apartment oven note: Many pre-war triplex buildings in the Plateau, Rosemont, HoMa, and Mile End have older gas ranges with lower maximum temperatures (around 230°C/450°F). The burn-off method still works — it just takes longer (90 minutes rather than 60). If your oven has a self-cleaning cycle, you can run the stone through it: self-clean reaches 480°C (900°F) and will carbonize virtually everything. Note that self-cleaning generates significant smoke; open your kitchen window and run the range hood.
---
Pizza Stones Available in Montreal
Lodge P14P3 (14-inch, cordierite, $35–50): Available at Canadian Tire and Walmart locations across Montreal (NDG, Anjou, Pointe-Claire, LaSalle). The most widely available budget pizza stone in the city. Cordierite construction, good heat retention, handles up to 500°F (260°C). Hand wash only per manufacturer guidelines; burn-off method compatible.
Old Stone Oven by Honey-Can-Do 4467 (14.5" × 16.5" rectangular, $40–60): Available on Amazon.ca with next-day delivery to Montreal. Also stocked at some Walmart locations. Cordierite construction, one of the most popular pizza stones in North America. Slightly thicker than Lodge, excellent heat distribution.
Emile Henry Flame Top Pizza Stone ($89–120): Available at Zone Culinaire (Laval, Boucherville, Anjou) and Williams-Sonoma (Fairview Pointe-Claire, Carrefour Laval). Made from Burgundy clay, slightly less porous than cordierite but more forgiving of moisture. The one pizza stone where a small amount of dish soap is permitted by the manufacturer, though minimal soap and thorough rinsing is still required. More resistant to thermal shock than cordierite.
Weber Gourmet BBQ System Pizza Stone: Available at Canadian Tire and Home Depot locations across Montreal (Anjou, Pointe-Claire, LaSalle, Brossard). Designed for Weber gas grills but works in conventional ovens. Cordierite construction. Many Plateau, Mile End, and Outremont apartments have balcony gas BBQs — this stone is the right tool for outdoor summer pizza in those spaces.
UNICOOK Heavy Duty Cordierite Pizza Stone ($30–45): Available on Amazon.ca. Thicker than Lodge, excellent heat retention, 2.4 cm (0.95 inch) thick. No-soap protocol.
---
Montreal-Specific Cleaning Considerations
Hard water mineral deposits (90–150 mg/L CaCO₃): Montreal's water is moderately hard. If you use any water during cleaning, dry the stone thoroughly afterward. White mineral scale can develop on the surface from repeated wet-cleaning; since you should be dry-cleaning anyway, this is largely a non-issue if you follow the no-water protocol.
Summer humidity storage (June–August): Montreal's summers regularly hit 70–80% relative humidity, and pre-war triplexes in the Plateau, HoMa, NDG, and Rosemont often have no central air conditioning. A pizza stone stored in a sealed kitchen cupboard during July and August can absorb ambient moisture, which then steams off aggressively during the next preheating session. Store your stone in the oven (turned off) or on an open shelf to allow airflow.
Apartment oven preheating: Always place the pizza stone in a cold oven and heat them together. Never place a cold pizza stone into a preheated oven — the rapid temperature change causes thermal shock and stone cracking. In Montreal's DCC-compliant gas ranges and standard electric coil ovens (the dominant types in pre-war triplex kitchens), preheating stone and oven together from cold for 45–60 minutes before baking produces the best results.
---
What "Dirty" Actually Looks Like on a Pizza Stone
New pizza stone owners often worry that their stone is dirty when it is actually perfectly seasoned. Expect your pizza stone to:
- Turn permanently dark brown to black in spots where oil and carbon have built up — this is normal and desirable
- Develop a non-uniform, blotchy appearance with lighter and darker areas — this is seasoning, not contamination
- Never return to its original beige/off-white color — this is fine; it will never bake "clean"
The only signs of a problem are: - White powdery patches that don't brush off (absorbed mineral scale from wet cleaning — avoid future water contact) - Strong persistent odors that don't burn off after a full-temperature cycle (rare; usually from soap contamination) - Cracks (thermal shock or manufacturing defect — replace the stone)
---
When to Replace Your Pizza Stone
A well-maintained cordierite pizza stone lasts 5 to 10 years with regular use. Replace it when: - It develops cracks that go through the stone (risk of breaking in the oven) - It has a permanent off-taste or odor that doesn't clear after multiple burn-off cycles (typically from soap contamination — avoid this entirely by never using soap) - The surface is so uneven that pizza slides unevenly
---
FAQ
Q: Can I use dish soap on a pizza stone?
A: No. Cordierite pizza stones are porous and permanently absorb dish soap and detergent. Soap baked into the pores imparts a bitter, chemical taste to every pizza you make afterward. The contamination cannot be reversed by rinsing or baking. Use only the dry-scrape method, baking soda paste for spot cleaning, and the burn-off method for heavy residue.
Q: How do I get burnt cheese off a pizza stone?
A: Let the stone cool completely. Make a paste of equal parts baking soda and water. Apply it to the burnt cheese, let it sit for 5–10 minutes, then scrub gently with a stiff nylon brush. Wipe off with a barely damp cloth and dry thoroughly. For stubborn carbonized cheese, run the burn-off method (oven at max temperature for 1 hour) to turn the residue to ash, then brush off.
Q: How do I get rid of the smell from my pizza stone?
A: Run the burn-off method: place the stone in a cold oven, heat to maximum temperature (260–315°C), leave for 1 hour, then let cool completely with the oven off. Burned organic residue that causes odors is carbonized to ash and eliminated. This is effective for garlic, onion, anchovy, and other strong-smelling topping residue.
Q: Is it normal for my pizza stone to turn brown or black?
A: Yes. Dark discoloration is normal and desirable. It is the carbon and oil seasoning that accumulates from regular use and actually improves the stone's non-stick properties over time. A pizza stone that still looks beige after 20 uses is unusual — most develop dark patches quickly. Do not attempt to scrub or bleach the discoloration off.
Q: How do I prevent my pizza stone from cracking?
A: Never subject the stone to thermal shock: always place it in a cold oven and heat together, never pour cold water on a hot stone, and let it cool completely before moving it. Also never place the stone directly on an electric or gas stovetop burner, and never use it in a broiler at extreme temperatures.
Q: How should I store my pizza stone between uses?
A: Store it in a cool, dry location with airflow — inside your oven (turned off) on the rack is ideal, or on an open kitchen shelf. Never store it in a sealed plastic bag or in a humid cupboard, especially in Montreal's summer (June–August, 70–80% RH). A damp stone heated to baking temperature will steam aggressively from the inside, which degrades the surface over time.
