Preheat your oven to 350°F (175°C). Grease a 9x13 inch baking pan or line it with parchment paper for easy removal.
In a large mixing bowl, combine the melted butter and brown sugar. Mix until smooth and creamy.
Add the eggs one at a time, mixing well after each addition. Then stir in the vanilla extract until fully combined.
In another bowl, whisk together the flour, baking powder, and salt. Gradually add the dry ingredients to the wet mixture, stirring gently until just combined.
Fold in the white chocolate chips, dried cranberries, and orange zest (if using) until evenly distributed throughout the batter.
Pour the batter into the prepared baking pan and spread it evenly using a spatula.
Bake in the preheated oven for 25-30 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out mostly clean with a few crumbs.
Allow the blondies to cool in the pan for at least 15 minutes before slicing them into squares.
Notes
Serve warm or at room temperature. Dust with powdered sugar for presentation.
Keyword blondies, cranberries, dessert, white chocolate