What substance would always be in the middle of the liquid mixture water and corn syrup?

In a liquid mixture of water and corn syrup, the substance that would typically be in the middle is a layer of liquid that has a density between that of water and corn syrup. This could be a solution created by mixing the two substances to a specific concentration, where the resulting mixture has properties that average the densities of both components. If the two liquids are not completely miscible, there may also be a distinct interface or layer formed between them.