1 For the cakes: Preheat the oven to 180°C (approximately 350°F). Butter the pans and sprinkle with flour.
2 Sift the flour into a bowl and make a well in the middle. Mix the yeast with 2 tablespoons warm milk until dissolved, then pour into well and gradually mix in flour to make a smooth dough. Cover and let rise for about 30 minutes. Add the eggs, butter, remaining warm milk and the sugar to the dough and beat until a slightly firm dough. Fit dough into cake pans and let rest for about 15 minutes. Bake for about 1 hour, or until a toothpick inserted in center comes out clean.
3 Allow cakes to cool and remove from the pans.
4 For the icing: Beat the powdered sugar with cream and rum into a thick, glossy glaze. (Add a little more cream if needed.) Drizzle over the cake, garnish as desired with flowers, let icing dry and serve.