Start by buttering a 9x13-inch baking dish, then line it with parchment paper for easy removal later. This will ensure your bars come out nicely without sticking to the pan.
In a large mixing bowl, pour in the Golden Grahams cereal. Set it aside while we prepare the marshmallow mixture.
In another large bowl, combine the 5 cups of miniature marshmallows, 1½ cups of chopped Hershey chocolate, light corn syrup, and butter. Microwave this mix in 30-second increments, stirring after each increment. You want to keep microwaving until the mixture is completely melted and smooth. Be patient during this step; it’s worth it!
Once melted, stir in the vanilla to enhance the flavor. The aroma will be irresistible!
Carefully pour the melted mixture over the bowl of Golden Grahams cereal. Using a buttered spatula or a wooden spoon, gently stir everything together. Ensure that all the cereal is coated with that delicious marshmallow mixture. You can almost taste the sweetness already!
Add in the additional 1 cup of miniature marshmallows and stir them in for that extra gooey texture in every bite.
Now it’s time to transfer the mixture into your prepared baking pan. Use your buttered hands or a non-stick spray to press the mixture evenly into the pan, forming a flat, even layer. This step is crucial for getting those perfect bars!
Let the mixture set at room temperature for at least an hour. If you’re in a hurry, pop the pan into the refrigerator to firm them up faster.
Once set, cut them into bars. Store your Golden Grahams S’mores Bars in an airtight container at room temperature for up to 2 days, but I doubt they’ll last that long!