Mountain Christmas Cookies

Bahan-bahan (24 porsi)

• ½ cup (1 stick) butter, (softened)
• ½ cup shortening
• 1¼ cups packed brown sugar
• ¾ teaspoon baking soda
• ¼ teaspoon salt
• 3 large eggs
• 2 teaspoons vanilla extract
• 3½ cups all purpose flour
• 1 cup Christmas colored M&M's
• 1 cup chopped pecans ((optional))