Can you use margarine instead of butter in making toffee?

It is not advisable to use margarine instead of butter when making toffee. Margarine is made from vegetable oils, while butter is made from dairy fat. These fats have different melting points and chemical compositions, which will affect the final texture and flavor of the toffee. Butter has a higher fat content than margarine, which gives it a richer flavor and makes it more suitable for making toffee. Margarine contains more water than butter, which can cause the toffee to become too soft or grainy. Additionally, the vegetable oils in margarine can give the toffee a slightly greasy or off flavor. For best results, it is recommended to use unsalted butter when making toffee.