Makes 24 blondies Ingredients 1 stick plus 6 Tbsp. (14 Tbsp. total) unsalted butter, softened, plus more for greasing 1 1/2 cups white chocolate chips, divided Directions Active time: 20 minutes Total time: 45 minutes Preheat oven to 350Â°. Grease a 9- x 13-inch baking dish with butter. In a large bowl, mix sugars, butter and salt until combined. Stir in vanilla extract, then eggs, one at a time, until combined. Add flour, baking powder and baking soda, then stir until almost combined.