Main Difference
The main difference between Garlic Salt and Garlic Powder is that the Garlic Salt is a seasoned salt made of a mixture of dried, ground garlic and table salt and Garlic Powder is a type of spice
Garlic Salt
Garlic salt is a seasoned salt made of a mixture of dried, ground garlic and table salt with an anti-caking agent (e.g. calcium silicate). In its most basic form it is made by combining 3 parts salt and 1 part dried garlic powder by volume, or 6 parts salt and 1 part garlic powder by weight.
Garlic Powder
Garlic powder is a spice that is derived from dehydrated garlic and used in cooking for flavour enhancement. The process of making garlic powder includes drying and dehydrating the vegetable, then powdering it through machinery or home-based appliances depending on the scale of production. Garlic powder is a common component of spice mix. It is also a common component of seasoned salt.