In a large saucepan over low heat, melt butter most of the way.
6 tablespoons butter
Add 16 ounces marshmallows, and stir until completely melted.
21 ounces mini marshmallows
Remove from heat.
Stir in 8 cups cereal until combined.
8 ¼ cups Golden Grahams cereal
Add remaining 5 ounces marshmallows and 1/2 cup mini semisweet chocolate chips, and stir to combine.
¾ cup mini semisweet chocolate chips
Press cereal into baking dish.
Sprinkle with remaining 1/4 cup cereal and 1/4 cup mini chocolate chips.
Let cool to room temperature before cutting and serving.
Video
Notes
Golden Grahams: A reader kindly brought it to my attention that the 11.7 ounce boxes of Golden Grahams only have 8 cups of cereal. So, when purchasing, you may want to choose a larger box to make sure you have enough.
Pressing the cereal: If you're having trouble with the cereal sticking to your hands, lightly spritz them with nonstick baking spray.