Preheat your oven to 350°F (175°C) and grease a 9x13-inch baking dish.

Melt 1/4 cup of unsalted butter over low heat and stir in a splash of vanilla extract.

In a large mixing bowl, combine 6 cups of Golden Grahams cereal and 3 cups of mini marshmallows. Pour the melted butter mixture over the blend and toss to coat evenly.

Spread half of the coated mixture evenly in the prepared baking dish. Layer 2 cups of chocolate bars on top, then add the remaining mixture.

Press down gently and bake for 10 minutes until marshmallows are golden brown.

Let cool for about 15 minutes, then slice into squares and serve warm.