Disappearing Reese's Marshmallow Chocolate Chip Blondies

INGREDIENTS

Eggs, large

1 1/2 cups

mini reese's pieces peanut butter cups, Mini

1/3 cup

Reese's peanut butter chips

1 cup

ghirardelli milk chocolate chips

1 tsp

Baking powder

1 3/4 cups

Brown sugar, firmly packed

2 1/2 cups

Flour

1 tsp

Salt

2 tsp

Vanilla extract, pure

2 cups

Kraft jet-puffed marshmallows

1 cup

Butter (melted and mostly cooled)