Preheat oven to 350°F (175°C). Grease two 9×5-inch loaf pans with oil or baking spray and sprinkle each with 1 tablespoon sugar.
In a large bowl, whisk together pumpkin puree, eggs, oil, and apple juice or vanilla until smooth.
In another bowl, combine flour, baking soda, baking powder, salt, and pumpkin spice.
Gradually fold dry ingredients into the wet mixture until just combined.
Pour batter evenly into prepared loaf pans and sprinkle tops with remaining sugar.
Bake for 60–65 minutes, or until a toothpick inserted in the center comes out clean.
Cool completely on a rack before slicing.