Take 1 cup of the mini marshmallows and set them off to the side.

In a saucepan, melt the butter, and then add the chocolate chips, the rest of the marshmallows, and the vanilla and stir until melted and combined.

Turn off the heat and add the Golden Grahams cereal and then the rest of the marshmallows to the mix and combine.

Using a spatula, press the mix firmly into a greased 9x13 pan. If you don’t press them down enough, they may fall apart when you cut them.

Let them cool for an hour or two, and then cut them into 18 bars.