Is CorningWare casserole dish dishwasher safe?
Sometimes — the original Pyroceram body is dishwasher safe, but the plastic lid and any metal trim are not.
Quick facts
| Dishwasher safe? | Sometimes — Sometimes — with care |
|---|---|
| Category | Bakeware |
| Source | AI-reviewed · manufacturer guidance & material science |
| Last checked | 2026-07-28 |
Why
CorningWare casserole dishes are made of Pyroceram, a glass-ceramic material that is highly resistant to thermal shock and dishwasher conditions. The body can withstand high heat and alkaline detergents without warping or clouding. However, many newer CorningWare dishes come with plastic lids (often polypropylene or similar) that may warp or degrade in the dishwasher's high heat. Additionally, any metal trim or decorative paint can corrode or peel. The manufacturer states that the glass-ceramic base is dishwasher safe, but recommends hand washing lids to preserve their fit and seal. Repeated machine washing of the lid can cause the plastic to become brittle or misshapen, leading to poor sealing. The body itself is durable and will not etch or cloud like soda-lime glass. The primary failure mode for the lid is warping and seal degradation; for the body, there is no significant risk.
How do you wash CorningWare casserole dish?
- Remove the plastic lid and set aside.
- Hand wash the lid with warm water, mild dish soap, and a soft sponge.
- Rinse the lid thoroughly and dry with a soft cloth.
- Place the Pyroceram body in the dishwasher on the top rack, away from heating elements.
- Use a gentle cycle with low heat if available.
- After the cycle, remove the body promptly and allow to air dry.
- Do not stack other items inside the dish during washing to prevent scratching.
What happens if you put CorningWare casserole dish in the dishwasher?
If you wash the entire CorningWare dish (including the plastic lid) in the dishwasher, the Pyroceram body will emerge unchanged even after many cycles. However, the plastic lid may warp after just one wash if placed on the bottom rack near the heating element. Over repeated washes, the lid can become permanently deformed, making it difficult to snap on and creating gaps that compromise sealing. The lid's plastic may also develop a chalky appearance or become brittle. If the dish has any metal trim (e.g., on older models), it may rust or discolor. The damage is primarily cosmetic for the lid but functional if the seal is lost. The body remains fully functional and safe to use.
Frequently asked questions
- Can the CorningWare body go in the microwave?
- Yes, the Pyroceram body is microwave-safe. However, remove the plastic lid before microwaving, as the lid is not microwave-safe.
- What temperature can CorningWare withstand?
- Pyroceram can withstand temperatures from -40°F to 500°F (-40°C to 260°C), making it safe for oven use, broiling, and freezer storage.
- How do I remove baked-on food from CorningWare?
- Soak the dish in warm water with baking soda or use a non-abrasive cleaner. Avoid metal scouring pads that can scratch the surface.
- Is the lid oven-safe?
- No, the plastic lid is not oven-safe. It is designed for storage and microwave use only (if labeled microwave-safe). For oven cooking, use the dish without the lid or with a metal lid if provided.
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Last updated 2026-07-28. General guidance — always check your product’s care label. How we verify · Dishwasher care guides.