Preheat oven to 200 C / 392 F and line the bottom of a pan with parchment or grease the pan well.
Mix all dry ingredients in a bowl.
Add cream, rum, oil and mix well.
Pour batter into the baking pan and bake for about 25 min or until toothpick test comes out clean.
Let cool in the pan before removing.
Mix frosting ingredients and adjust ingredients to taste and preferred consistency.
Coat the cake with frosting and decorate with cranberries and mint leaves (optional, but looks very festive!). Enjoy this delightful winter cake!