Heat oven to 350°F. Whisk together flour, sugar, spice, baking soda and salt in a large bowl; set aside.
In separate bowl, mash sweet potatoes. Add eggs, oil and vanilla; whisk to combine.
Fold sweet potato mixture into flour mixture, just until moistened. Spoon batter into two greased 8 x 4-inch loaf pans.
Bake 55 to 60 minutes, or until wooden pick inserted in center comes out clean. Cool in pans on rack 10 minutes before removing pans.
Notes
VARIATIONS: Prepare recipe as directed, except:Muffins - Spoon about 1/4 cup batter into 24 greased or paper-lined muffin cups. Bake at 350°F 20 to 25 minutesStir-Ins - Add about 1 cup of any one or combination of the following ingredients: raisins, currants, dried cranberries, chopped nuts, shredded carrot or shredded flaked coconutToppings - Sprinkle tops of loaves or muffins with chopped walnuts, pecans, pumpkin seeds, granola or cinnamon-sugar before baking.