In a medium-sized bowl, combine the butter, parsley, onion powder, seasoned salt, and garlic salt. Stir well.
Add the bread to the bowl and carefully stir to coat the bread with the seasoned butter.
Place buttered bread into the air fryer basket and cook for 5 to 7 minutes, or until the bread is toasted. Serve immediately.
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Recipe Tips
If you have any croutons left over, they can be stored in an air tight container. Wait until they have cooled completely. These stay fresh for two to three days.