Preheat oven to 350°F. Grease the 9x13 non-stick baking pan. You can also line the bottom of it with a sheet of parchment paper.
Add peeled pumpkin chunks to the food processor or blender. Process on high until the pumpkin is grated into small shreds. You can also use the box grater.
In a separate bowl, whisk 2 cups all purpose flour, 2 teaspoons ground cinnamon, ½ teaspoon ground cloves, ½ teaspoon ground ginger , ¼ teaspoon ground nutmeg , 2 teaspoons baking powder, ½ teaspoon baking soda, and ½ teaspoon salt.
In a second large bowl, add 2 large eggs, ¾ cup granulated sugar, ½ cup oil, ½ cup sour cream, 1 teaspoon vanilla extract . Whisk well until one consistency.
Add 2 cups of grated pumpkin to wet ingredients and whisk it again to combine.
Add flour mix into the wet ingredients and mix just until it all combined.
Pour the batter into a prepared baking pan, using a spoon to spread it evenly. Bake for about 30-35 minutes at 350°F or until the toothpick inserted in the middle comes out clean.
Let the cake cool down in a pan completely. Once cooled down, spreed the cream cheese frosting. Once frosted, store the cake in the fridge.