Preheat oven to 325. Grease a loaf pan with butter and set aside.
In a large mixing bowl, whisk together the flour, cinnamon, baking soda, baking powder, and salt.
Using a fork, mix in the eggs, applesauce, melted butter, and syrup until well combined, taking care not to overmix. Gently fold in the raisins.
Spoon the batter into the prepared loaf pan. Bake until a skewer inserted into the center comes out clean, 45 to 55 minutes.