In a large bowl, mix cereal, cookies and 1 cup marshmallows.

In a large pot over medium heat, melt butter.

Stir remaining marshmallows and salt into the melted butter. Continue stirring over medium heat until marshmallows are completely melted into butter.

Pour marshmallow mixture over cereal mixture and gently stir with a rubber spatula until evenly combined.

Spread mixture into a 9”x9” square pan and press gently with spatula to flatten; add sprinkles.

Cool in pan for about 30 minutes before serving. Store leftovers in an airtight container.