Preheat the air fryer. Set it to 300°F (150°C). A lower temp helps the seasoning set without burning.

Mix the seasoning. In a large bowl, combine ranch seasoning, garlic powder, onion powder, dill, black pepper, and red pepper flakes. Stir in lemon zest if using.

Add the fat. Pour in melted butter or olive oil and whisk until you have a smooth, fragrant mixture.

Toss the crackers. Add the crackers to the bowl and gently fold with a spatula until every piece is evenly coated. Take your time—coating equals flavor.

Prep the basket. Lightly spray or brush the air fryer basket to prevent sticking. Avoid heavy sprays that can pool.

Air fry in batches. Spread a single layer of crackers in the basket. Air fry for 5–7 minutes, shaking halfway. You’re looking for a lightly toasted color and a dry surface.

Cool and repeat. Transfer finished crackers to a sheet pan or large plate to cool completely. Repeat with remaining batches.

Add finishing touches. While still slightly warm, sprinkle on grated Parmesan and chopped herbs if using. Toss gently to coat.

Taste and adjust. If you want more punch, dust with a bit more ranch seasoning while warm. Let cool fully before storing to lock in the crunch.