Flour comes from dried wheat that’s milled and not heat treated (because it messes with the gluten). Because wheat is grown in nature, Salmonella or E. coli or other nasties can be present. As Salmonella dries out it gets hardier and survives for months (or longer).
In Nov. 2018, the U.S. Food and Drug Administration investigated recalled Duncan Hines Cake Mixes potentially linked to seven Salmonella Agbeni illnesses.
On January 14, 2019, the Centers for Disease Control reported the outbreak appeared to be over. The FDA, CDC, public health and regulatory officials in several states worked together to investigate this multistate outbreak of Salmonella Agbeni infections.
The FDA recommends consumers to not bake with or eat the recalled product. Additionally, consumers should not eat uncooked batter, flour, or cake mix powder.
Consumers should always practice safe food handling and preparation measures. It is recommended that they wash hands, utensils, and surfaces with hot, soapy water before and after handling food.
FDA offers these tips for safe food handling to keep you and your family healthy:
Do not eat any raw cake mix, batter, or any other raw dough or batter product that is supposed to be cooked or baked.
Wash hands, work surfaces, and utensils thoroughly after contact with flour and raw batter or dough products.
Keep raw foods separate from other foods while preparing them to prevent any contamination that may be present from spreading. Be aware that flour or cake mix may spread easily due to its powdery nature.