Preheat the oven to 350°F (175°C). Grease a loaf pan.

In a mixing bowl, whisk together the dry ingredients: flour, baking soda, baking powder, cinnamon, nutmeg, and salt.

In another bowl, mix the wet ingredients: pumpkin puree, vegetable oil, sugar, eggs, and vanilla extract until well combined.

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

Pour the batter into the prepared loaf pan and smooth the top.

Bake in the preheated oven for 60 minutes, or until a toothpick inserted into the center comes out clean.

Allow the bread to cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.