Prepare all ingredients by gathering 6 cups of Krispie cereal, 1 cup of crushed Oreo cookies, and 1 cup of mini marshmallows in a large mixing bowl.

In a medium saucepan over medium heat, melt 4 tablespoons of butter until it bubbles gently. Add 8 cups of mini marshmallows and a pinch of salt, stirring continuously until completely melted and smooth.

Pour the melted marshmallow mixture over the dry ingredients in your mixing bowl and gently fold for about 2-3 minutes, ensuring all ingredients are coated.

Prepare a 9-inch square pan by greasing it lightly. Pour the mixture into the pan, spreading it evenly and pressing down firmly to ensure a smooth top.

Allow the mixture to cool at room temperature for about 30 minutes before cutting into squares or rectangles.