My chocolate has a dusty white coating — is it safe to eat?

rancid or off smell, visible mold, or an unusual taste, it should be thrown away. These signs suggest that the chocolate may have been contaminated or spoiled.
Additionally, if the chocolate has been stored in unsanitary conditions or has come into contact with potential allergens or contaminants, it’s best to err on the side of caution and discard it.
11. What Chefs and Chocolatiers Really Do With Bloomed Chocolate
Professional chefs and chocolatiers often have techniques to deal with bloomed chocolate, ensuring that it doesn’t go to waste. When chocolate