Flour is made from grains that are grown in fields where they may be exposed to a variety of harmful bacteria like Salmonella and E. coli. The processing that flour goes through to convert from plant to powder doesn’t kill them. And unlike lettuce or carrots, you can’t wash flour to clean it. To ensure your no-bake dessert, like protein cookie dough, is safe to consume you can heat treat your flour. See below for details and instructions!