| It’s possible some plastic, non-oven safe material or cleaner residue burned in the oven while the brownies were baking. My MIL accidentally left plastic wrap on some frozen entree and it started smoking, ruining all the food in the oven. |
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1. You have Covid or are recovering from Covid
2. Bakery burned them 3. Baker dropped their cigs into the batch before they walked out the door 4. Baker dropped something in accidentally |
| someone forget to add sugar |
| Burned mouse in oven. |