Crinkle Top Lemon Blondies

Bahan-bahan (16 porsi)

• 1/2 cup granulated sugar
• 1 tablespoon lemon zest
• 3/4 cup brown sugar
• 1 stick (8 tablespoons) salted butter
• 2 teaspoons vanilla extract
• 3 large eggs, at room temperature
• 3.5 ounces high quality white chocolate, finely chopped ((optional) )
• 1 cup all-purpose flour
• 1 teaspoon baking powder
• 1/2 teaspoon sea salt
• 3 tablespoons salted butter, browned
• 2 -3 tablespoons lemon juice
• 1 teaspoon vanilla extract
• 1 cup powdered sugar
• 2 tablespoons lemon zest
• 2 tablespoons granulated sugar