It depends on the material the mugs are made of. Not all mugs are oven-safe, so it's essential to check the manufacturer's instructions or look for any labeling on the mug to determine if it is oven-safe.
Generally, mugs made from materials like ceramic, porcelain, and oven-safe glass are safe to use in the oven. These materials are designed to withstand high temperatures typically encountered in baking and cooking.
However, certain mugs, especially those with decorative elements like metallic or plastic coatings, may not be safe for oven use. The high temperatures in the oven can cause these coatings to melt, release harmful fumes, or damage the mug.
To be safe, follow these steps:
Check the mug: Look for any labeling or symbols on the bottom of the mug that indicate whether it's oven-safe.
Verify the temperature: Ensure that the temperature you plan to use in the oven is within the safe range for the mug material.
Preheat with care: If you're preheating the oven with the mugs inside, make sure it's done gradually to avoid sudden temperature changes that could crack the mugs.
Avoid extreme temperature changes: Don't place a cold mug directly into a hot oven or vice versa, as this could cause thermal shock and lead to cracking.
Use oven mitts: Always use oven mitts or thick towels to handle hot mugs and avoid burns.
If you're unsure about the mugs' oven-safety, it's better to err on the side of caution and not use them in the oven. Instead, consider using oven-safe bakeware or dishes specifically designed for baking.