frosted zucchini bars

Ingredients

• 3/4 cup butter
• 1/2 cup granulated sugar
• 1/2 cup packed brown sugar
• 2 large eggs
• 1 teaspoon grated orange peel
• 1 teaspoon pure vanilla extract
• 1 3/4 cups all purpose flour
• 1 teaspoon baking powder
• 1/4 teaspoon salt
• 2 cups grated zucchini
• 1 cup golden raisins
• 1/2 cup flaked coconut
• FROSTING
• 3 cups powdered sugar
• 1/2 cup butter
• 1 package (3 oz) cream cheese, softened
• 1 teaspoon grated orange peel
• 1 tablespoon fresh orange juice
• 1/2 teaspoon pure vanilla extract
• 1/2 cup +/- chopped walnuts (optional)