does anyone know the origin of the oreo mug cake audio?

The audio likely originated from a creator named @sweetportfolio (or similar cooking accounts like @fitwaffle), who are famous for these "3-ingredient" microwave recipes. However, the specific version you’re probably hearing is a high-pitched, sped-up remix that became a global template for everyone to use. If you are looking for the sound itself to use in your video, the easiest way is to search for "Oreo Mug Cake" in the TikTok audio library and look for the one with the most "original" tag or the highest number of videos linked to it. Usually, the top result is the one that started the craze.