While camping, you accidentally burn your marshmallows. is this a physical or chemical change? how can you tell?

It is a chemical change because it cannot go back to its original form

While camping, you accidentally burn your marshmallows. This situation shows a chemical change. During a chemical change, both the identity and the properties of a substance change because new substances are being formed by a chemical reaction. Here, the marshmallow is changed into a new form which cannot be reversed to the original.

It’s the energy source of stars