Preheat oven to 300 degrees . Grease bundt pan well.
Whisk the eggs in a bowl.
In a large bowl, cream the butter with the sugar. Beat in the egg , lemon juice, lemon rind, 1 shot of rum and milk.
In another bowl, stir together the flour, baking powder, and cinnamon. Beat into the creamed mixture. Place batter into the prepared pan.
Bake at 300 degrees F1.5 hours or until cake tests done when a toothpick inserted in the center comes out clean. As soon as you remove the cake from the oven, sprinkle the top evenly with the 1 shot of rum.
Sprinkle with Powdered Sugar
Recipe by Budget Savvy Diva at https://www.budgetsavvydiva.com/2012/12/rum-cake-recipe/