What has layers but isn’t a cake?

Riddle Explanation:
The riddle, “What has layers but isn’t a cake?”, cleverly describes an onion. Onions consist of multiple concentric layers that can be peeled away, much like a layered cake. However, unlike a cake, onions aren’t sweet and certainly aren’t a dessert! This riddle playfully contrasts culinary expectations, highlighting the structural similarity between very different foods.