In food processor pulse croutons until they are a fine crumb. There should be about 1 3/4 cups.
Add flour, black pepper, chipotle chili pepper, onion powder, and Parmesan to food processor and pulse to combine and mix. Pour crouton mixture into a shallow dish. In another shallow dish mix eggs and milk.
Dunk the chicken in eggs then into crouton mixture.
Put butter and canola oil into bottom of a frying pan(oil and butter should barely cover bottom of pan) and heat over med heat.
As oil comes up to temperature, redunk the chicken in the egg and coat a second time.
Once oil gets hot, start frying the chicken, 3-4 minutes a side, until done and juices run clear.