Guides Pareve means a food has no meat and no dairy, which lets it sit at either a meat or a dairy meal. It is one of the three core kosher categories, alongside meat and dairy. Knowing how to spot it on a label saves you from mixing what kosher law keeps apart.
Is It Kosher? Yes, Oreos sold in the United States are kosher. Every standard variety carries OU-D certification from the Orthodox Union, meaning they are certified kosher dairy. Outside the US the answer gets more complicated, and this guide walks through exactly what to check on the package.