Preheat the oven to 350°F (175°C). Grease and flour the baking pan.

In a mixing bowl, cream together the butter and sugar until light and fluffy.

Add the eggs and pumpkin puree, mixing until well combined.

In another bowl, whisk together the flour, baking powder, baking soda, spices, and salt.

Gradually add the dry ingredients to the wet mixture, stirring until just combined.

Pour the batter into the prepared baking pan.

Bake for 30 minutes or until a toothpick inserted into the center comes out clean.

Allow to cool before serving.