In a food processor, combine the drained sweet potatoes, white sugar, eggs, cinnamon, ginger, nutmeg, salt, allspice, and cloves. Process until the mixture is completely smooth, approximately 30 seconds. Transfer the sweet potato mixture to a large mixing bowl. Add the milk, canola oil, baking powder, and baking soda. Use a fork to thoroughly combine all wet ingredients. Gradually incorporate the all-purpose flour, mixing gently with a fork or spatula until just combined. Be careful not to overmix; a few lumps are perfectly fine. (15 minutes)