Preheat oven to 350 degrees F. Spray a 9x13 baking pan with baking spray, or butter and flour the pan. In a medium bowl whisk together the flour, baking powder, baking soda, cinnamon, ginger, allspice, nutmeg, and salt. Set aside.
2 cups All-purpose flour, 2 tsp Baking powder, 1 tsp Baking soda, 2 tsp Ground cinnamon, 1/2 tsp Ground allspice, 1/2 tsp Ground ginger, 1/4 tsp Ground nutmeg, 1/2 tsp Kosher salt
In a large bowl using an electric mixer on medium-low speed beat the eggs, sugar, oil, and vanilla extract for about 2 minutes. Scraping down the bowl as necessary.
4 large Eggs, 1 1/2 cups Vegetable oil, 1 3/4 cups Granulated sugar, 2 tsp Vanilla extract
Turn the mixer to low speed and gradually add the dry ingredients to the wet ingredients, beating until combined. Fold in the shredded sweet potatoes and pecans.
3 cups Fresh sweet potatoes, 1 cup Pecans
Pour the batter into the prepared pan and bake for 35-40 minutes, or until a toothpick inserted into the center comes out clean.
Cool completely on a wire rack.