Final answer:
Garlic salt is a blend of garlic powder and salt, offering both garlic flavor and saltiness, while garlic powder is purely ground dehydrated garlic, offering a strong garlic flavor without added salt.
Step-by-step explanation:
The difference between garlic salt and garlic powder lies in their composition and use in cooking. Garlic powder is a seasoning made from dehydrated, finely ground garlic. It provides a strong garlic flavor and aroma and can be used to season foods without adding additional salt.
On the other hand, garlic salt is a blend that typically consists of garlic powder and salt, usually in a ratio of 1 part garlic powder to 3 parts salt. This mixture adds both the flavor of garlic and the seasoning of salt in one ingredient, making it convenient for cooks who want to flavor their dish and add saltiness simultaneously.