Preheat oven to 350°F and line muffin pan with cupcake liners.
In a large bowl, combine all cupcake ingredients and mix with a whisk until batter is smooth and no lumps remain. Pour batter into cupcake liners, filling each about 2/3 full. Bake for about 18-20 minutes or until toothpick inserted comes out clean.
Let cupcakes cool before frosting. To make the frosting, add whipping cream, sugar and eggnog to a bowl of a stand mixer and mix on high speed until stiff peaks form. Put frosting in piping bag to pipe. Sprinkle piped cupcakes with ground cinnamon.
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.