In a medium bowl, combine flour, baking powder, baking soda, spices & salt. In a large bowl with an electric mixer, beat eggs, vanilla & sugar until mixture is pale yellow & fluffy. Add pumpkin puree & mix to combine. Fold in the dry ingredients. Using a rubber spatula, spread the cake batter evenly into prepared pan. Bake for about 10-13 minutes or until top of cake springs back when touched & tests done in the middle.