Ingredients:
1 cup unsalted butter, softened
2 cups granulated sugar
4 large eggs
3 cups all-purpose flour
1 tablespoon baking powder
1/2 teaspoon salt
1 cup milk
1/2 cup dark rum
1 teaspoon vanilla extract
For the Rum Syrup:
1/2 cup unsalted butter
1 cup sugar
1/4 cup water
1/2 cup dark rum