Preheat the air fryer: Set to 350°F (175°C). Preheating helps the marshmallows brown quickly without over-drying the crackers.

Prep the basket: Lightly mist the basket with nonstick spray or line with a perforated parchment round rated for air fryers. Avoid fully covering vents.

Build the base: Break graham crackers into bite-size pieces. Spread a single, slightly overlapping layer in the basket or in a small, oven-safe pan that fits inside your air fryer.

Add chocolate: Scatter chocolate chips or chopped bars evenly over the crackers. Aim for a good spread so every bite gets some chocolate.

Top with marshmallows: Sprinkle mini marshmallows in an even layer. Don’t mound too high, or they’ll toast before the chocolate melts.

Optional flavor boost: Drizzle 1–2 teaspoons of melted butter over the top and add a tiny pinch of sea salt. This enhances toasty, caramel notes.

Air fry: Cook at 350°F (175°C) for 3–5 minutes. Start checking at 3 minutes. You’re looking for golden, puffy marshmallows and glossy, softened chocolate.

Rotate if needed: If your air fryer browns more on one side, carefully rotate the pan or basket halfway through.

Finish and garnish: Remove carefully—everything will be hot and gooey. Add optional toppings like pretzel crumbs, sliced strawberries, chopped nuts, or a light drizzle of caramel or chocolate sauce.

Serve immediately: Let it sit 1 minute to set slightly, then dig in while it’s warm and melty.