01 - Preheat oven to 350°F. Grease and flour a 9x13-inch baking pan.
02 - In a medium bowl, whisk together the flour, baking powder, baking soda, salt, cinnamon, nutmeg, cloves, and ginger until evenly distributed.
03 - In a large bowl, whisk the granulated sugar, brown sugar, and vegetable oil until well combined. Beat in the eggs one at a time, mixing thoroughly after each addition.
04 - Stir the pumpkin purée and vanilla extract into the wet mixture until smooth and homogeneous.
05 - Gradually fold the dry ingredient mixture into the wet batter until just combined. Avoid overmixing to keep the crumb tender.
06 - Gently fold the chopped toasted pecans into the batter, distributing evenly throughout.
07 - Pour the batter into the prepared baking pan and smooth the top with a spatula for an even layer.
08 - Bake for 40–45 minutes, or until a toothpick inserted into the center comes out clean. Rotate the pan halfway through for even browning.
09 - Allow the cake to cool completely in the pan on a wire rack before applying the icing.
10 - Using an electric mixer, beat the softened cream cheese and butter together until smooth and creamy. Slowly add the sifted powdered sugar, then mix in the vanilla extract, ground cinnamon, and salt. Beat until light and fluffy.
11 - Spread the cinnamon cream cheese icing evenly over the completely cooled cake. Optionally garnish with pecan halves or a light dusting of cinnamon before serving.