Can you substitute oleo or real butter for unsalted butter?

Oleo, or margarine, is a dairy-free spread that is made with vegetable oils and often contains salt and preservatives. It is not a suitable replacement for unsalted butter in recipes as it has a different texture and flavor.

Real butter is made from dairy cream, and is a good substitute for unsalted butter in recipes. However, it is important to note that real butter contains salt, so if a recipe calls for unsalted butter, it is best to use unsalted butter to avoid over-salting the dish.