Preheat oven to 350 degrees F and line baking sheets with parchment paper.

In a food processor, process 2 1/2 cups cereal without marshmallows until a fine powder.

Set aside.

In the bowl of a stand mixer, beat butter until smooth.

Add sugars, and beat on medium-high speed until smooth and fluffy, about 2-3 minutes.

Add eggs and beat until combined.

Add processed cereal, flour, baking soda, and salt and mix on low-medium speed until combined.

Stir in marshmallows and white chocolate chips.

Roll into balls using about 1 tbsp of dough each.

Place on a baking sheet 2” apart.

Bake at 350 degrees F for 7-8 minutes, until mostly dry on top and slightly puffed – they will sink down and become chewy as they cool.