Heat oven to 350°F. In medium bowl, mix all crust ingredients except marshmallows with electric mixer on low speed until crumbly. Divide evenly among 24 nonstick mini muffin cups (about 2 level teaspoonfuls per cup); press firmly into bottom of each cup.
Bake 6 to 7 minutes or until puffed and golden brown. Place 5 marshmallows in each cup. Bake 1 to 2 minutes longer until marshmallows just begin to puff. Cool.
Meanwhile, in 2-quart saucepan, mix all topping ingredients except cereal. Heat over medium-low heat just until chips are melted and mixture is smooth, stirring constantly. Remove from heat; stir in cereal. Immediately spoon cereal mixture by heaping tablespoonfuls over marshmallows, pressing down slightly. Cool about 15 minutes or until firm. Remove from muffin cups; cool completely.