Butterscotch Chocolate Chip Blondies Recipe - Six Sisters' Stuff

Ingredients

• 1 cup butter (slightly melted)
• 1 ¾ cups brown sugar
• 2 eggs
• 1 ½ teaspoons vanilla
• 1 teaspoon salt
• 1 teaspoon baking powder
• 2 ⅓ cups flour
• 1 ½ cups chocolate chips (divided)
• 1 ½ cups butterscotch chips (divided)
• 1 ½ cups mini marshmallows