Pistachio Cranberry Oatmeal Icebox Cookies

• 2 sticks (1 cup) unsalted butter, softened
• 1 cup packed light brown sugar
• 2/3 cup granulated sugar
• 1 teaspoon baking powder
• 1/2 teaspoon baking soda
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon ground nutmeg
• 1/4 teaspoon salt
• 2 large eggs
• 1 1/2 teaspoons vanilla
• 1 1/2 cups all-purpose flour
• 3 cups old-fashioned rolled oats
• 1 cup roasted and salted shelled pistachios (about 5 ounces)
• 1 cup dried cranberries (about 4 ounces)