Pumpkin Shortbread Cookies

Bahan-bahan (36 porsi)

• 1 cup (2 sticks) unsalted butter, (at room temperature)
• ¾ cup granulated white sugar
• 2¼ cups all purpose flour
• 1 teaspoon pumpkin pie spice
• ½ teaspoon salt
• 1 cup unsweetened pumpkin puree
• 1 teaspoon vanilla extract
• a few drops of orange food color ((completely optional))
• 1½ cups powdered sugar
• ½ teaspoon pumpkin pie spice
• 1 to 2 tablespoons milk