Black garlic oil is a Japanese seasoning made by frying garlic until they are blackened resulting in a smoky and earthy condiment that is full of flavor. It is used as a flavoring in dishes like ramen, fried rice, and fried chicken. Black garlic oil is known for its rich and sweet taste, especially when used with tonkotsu ramen. It is distinct from black garlic, which is made by slow cooking garlic over several weeks on low heat.