Toasted Cashew and Marzipan Blondies

Name: Toasted Cashew and Marzipan Blondies
Ingredients: 3/4 cup (6 ounces) unsalted butter; 3/4 cup (4 1/2 ounces) white chocolate chips; 1/2 cup (3 1/2 ounces) dark brown sugar, loosely packed; 1/2 cup (3 1/2 ounces) granulated sugar; 2 eggs; 1 tablespoon vanilla extract; 1 1/2 cups (6 3/4 ounces) all-purpose flour; 1 teaspoon baking powder; 1/2 teaspoon salt; 4 ounces marzipan, chopped in small pieces (almond paste works too); 1 cup chopped toasted cashews; 1/4 cup (1 1/2 ounces) dark chocolate chips