Super simple (10 minutes prep!), no baking required, s'mores bars -- graham cracker flavored cereal, marshmallows, and milk chocolate.
Generously grease a 9 x 13 pan and set aside. Place the golden grahams cereal in a very large bowl and set aside.
In a very large microwave-safe bowl, add in 5 cups miniature marshmallows, 1 and 1/2 cups chocolate chips, cubed butter, and corn syrup. Stir and then place in the microwave for 2-4 minutes, removing to stir every 20 seconds.
When you remove the mixture every 20 seconds, stir for about 10 seconds making sure to really scrape the bottom, and then return to the microwave.
Microwave JUST until the mixture is melted and smooth and don't microwave more than needed.
Once the mixture is smooth, stir in the vanilla. Pour the mixture over the cereal and gently but quickly toss to combine. Pour in the remaining 1 cup marshmallows and 1/2 cup chocolate chips and stir until just incorporated.
Pour into the prepared pan. Spray your hands with cooking spray and then gently press down the bars (Don't press them too hard or it will make the bars hard).
Let stand, uncovered, for an hour (refrigerate for firmer bars).
Store loosely covered at room temperature for up to 2 days.