Food substitutions 101

Improvising in the kitchen takes a lot of practice. But when you get to that point in the recipe where you realize you're out of white wine/fresh garlic/brown sugar/whatever you absolutely MUST have for this recipe, being able to swap in another ingredient can really come in handy. Chef and author Kenji López-Alt and cook and food writer Deb Perelman walk us through the basics of food substitutions.