Preheat oven to 180 C. Grease and lightly flour a 12 cup muffin pan, or use paper muffin cups.
In a large bowl, combine sugar, oil and egg. Beat until smooth. Blend in banana and vanilla essence. Mix together flour, baking powder, bicarb soda, salt and cinnamon in a bowl, then stir into egg mixture until just combined. Mix in the prunes. Spoon mixture evenly between the muffin pans.
Bake in preheated oven for 20 to 25 minutes, or until a wooden skewer inserted into the centre of a muffin comes out clean.
The name will turn your guests off, but I guarantee that they'll eat two. I made mini-muffins, and they came out great. I used half of the sugar, and I didn't cut up the date enough. Next time, I'll cut them into smaller pieces so that the prune taste isn't so overpowering. - 29 Sep 2008
Always looking for a new muffin recipe, these were great. I added 1/2 cup vanilla low fat yoghurt, 1/2 cup grated carrot and 1/4 cup chopped walnuts. Added the extra vanilla as suggested and split the flour and used 1 cup of wholemeal and 3/4 cup plain. - 06 May 2013