Step 2: Place a large saucepan over low heat and melt the butter completely.

Step 3: Add 5 cups of mini marshmallows (reserve 1 cup for later) and the light corn syrup. Stir continuously until the mixture is smooth and fully melted.

Step 4: Remove the saucepan from heat and stir in the vanilla extract.

Step 5: Add the Golden Grahams cereal and gently fold until the cereal is evenly coated with the marshmallow mixture.

Step 6: Let the mixture cool for 1–2 minutes, then fold in the chocolate chips and the reserved 1 cup of marshmallows.

Step 7: Transfer the mixture to the prepared baking dish and gently press into an even layer without packing it too firmly.

Step 8: Allow the bars to cool at room temperature for about 1 hour, or until fully set.

Step 9: Lift from the pan using the parchment paper, slice into squares, and serve.