Preheat oven to 350°F. Grease four 5x3-inch mini loaf pans.
In large bowl, cream the butter and both sugars together until smooth. Add the eggs, one at a time, and beat until well combined. Add the eggnog and vanilla and stir until combined.
In a medium bowl, whisk the flour, baking powder, salt and cinnamon. Add the dry ingredients to the wet ones in batches and stir until just combined.
Pour the batter into the loaf pans and and bake them for 30 to 40 minutes or until a toothpick inserted into the middle of the loaves comes out clean. Transfer the pans to wire baking racks to cool before removing the loaves from the pan.
The nutrition information provided are only estimates based on an online nutritional calculator. This is not a comprehensive list of all the nutrients in the recipe (i.e., does not include vitamins, cholesterol, etc). I am not a certified nutritionist. Please consult a nutritionist or doctor for accurate information and any dietary restrictions and concerns you may have.