Preheat oven to 325°F
Grease and flour one 10x4 inch loaf pan
Whisk together flour, salt, baking soda, baking powder, and ground spices
In a separate bowl beat the butter on medium speed for about 1 minute
Add in the sugar. Continue to beat at medium to medium high speed to incorporate air until mixture is pale yellow in color.
Beat in eggs one at a time
Add in the pumpkin. Mix to combine. Mixture will have a mottled appearance.
Mix in the dry ingredients until well-combined
Pour batter into prepared loaf pan. Drop pan to bang out any air bubbles.
Bake about 70 minutes
Cool in pan about 10-15 minutes before turning out onto wire cooling rack to cool completely