Take a bowl and mix margarine, sugar, vanilla sugar and the soy egg.
Add flour and baking powder. Mix it firmly with your hands.
Preheat the oven on 200 degrees.
Add soy milk and mix everything.
In a final step add baking soda, the vinegar and the sliced kiwi. After you mixed it one last time the mixture is ready for the muffin tray.
Fill the tray to 2/3 full with dough and bake the muffins around 20 minutes until they are golden and they pass the tooth pick test.
The muffins need to be cooled down to add the frosting.
To make the frosting the margarine needs to have room temperature. Just mix the margarine and the sugar together with the pureed berries.