Identify the form you need: ancho ground for dry rubs, or rehydrated/blended for sauces and batters.
Use the table’s ratio by weight (start with the recommended amount), then taste the mixture base (not just the finished bake).
If your substitute is more intense (especially chipotle), reduce to the lower ratio and add back depth with a small pinch of cocoa or smoked paprika.
Toast dried chiles (or ground spices) 30–60 seconds in a dry pan for a warmer, more “roasted” profile before mixing into the recipe.
Adjust heat and bitterness last: add a tiny pinch of sugar/honey if it tastes sharp, or add salt if it tastes flat.