Step 1

Grease a 9x13-inch baking dish. Set aside.

Step 2

In a large saucepan over low heat, melt butter most of the way.

Step 3

Add 16 ounces marshmallows, and stir until completely melted.

Step 4

Remove from heat.

Step 5

Stir in 8 cups cereal until combined.

Step 6

Add remaining 5 ounces marshmallows and 1/2 cup mini semisweet chocolate chips, and stir to combine.

Step 7

Sprinkle with remaining 1/4 cup cereal and 1/4 cup mini chocolate chips.

Step 8

Press cereal into baking dish.1

Step 9

Let cool to room temperature before cutting and serving.