Preheat oven to 350°. Spray a 13x9-inch baking dish with baking spray with flour.
In a large bowl, whisk together flour, pumpkin pie spice, baking soda, and salt. In a medium bowl, whisk together pumpkin, granulated sugar, oil, and eggs. Make a well in center of flour mixture; add pumpkin mixture, stirring just until combined. Gently fold in ¾ cup pecans. Pour batter into prepared dish, spreading to smooth. Sprinkle with remaining ½ cup pecans.
Bake until a wooden pick inserted in center comes out clean, about 40 minutes. Let cool completely in pan.
In a small bowl, whisk together confectioners’ sugar and milk until smooth. Drizzle glaze over cooled cake before serving.
Recipe by Taste of the South at https://tasteofthesouthmagazine.com/pumpkin-pecan-cake/