1 stick softened butter, 8 tablespoons

1/2 cup granulated sugar

1/2 cup packed light brown sugar

1 cup white chocolate chips, to melt

1 1/4 cups creamy peanut butter (reserve 2 tablespoons to add to melting white chips)

1 large egg

2 teaspoons vanilla

1 1/4 cups all purpose flour

1/2 teaspoon baking soda

1/4 teaspoon kosher salt

1 cup broken pretzel pieces

1 cup additional white chocolate chips