White Chocolate Chip Macadamia Nut Cookies

• 1/2 cup (1 stick) butter at room temperature
• 1/3 cup sugar
• 1/3 cup light brown sugar
• 1 large egg
• 1 teaspoon vanilla extract
• 1 cup all-purpose flour
• 1/2 teaspoon baking soda
• scant 1/4 teaspoon salt
• 6 ounces white chocolate, coarsely chopped (or 6-ounce package white chocolate pieces)
• 3/4 cup macadamia nuts broken into halves