Why is it called a 'surprise' cake? Well, it's got mayonnaise in it! At first I thought it was odd but come to think of it - mayonnaise consists of eggs and oil which is precisely what you put in a cake. I tell you, it was really easy to do and it turned out quite well. It's a shame my pictures don't give it justice. We had slices of it with custard and it was so delicious.
Chocolate Surprise Cake
250 g  self-raising flour
50 g  cocoa powder
1/4 tsp baking powder
200 g  caster sugar
2 tsp vanilla extract
200 g  good quality mayonnaise
1 medium egg
160 ml  [2/3 cup] cold water
- Preheat oven to 180°C/fan 160°C/350°F. Butter and flour a 9-inch/23cm round pan or 8-inch/20cm square pan.
- Sift (optional) the flour, cocoa, and baking powder into a large bowl.
- Stir in the sugar. Make a well in the centre.
- Add in all the other ingredients.
- Beat with electric mixer until smooth.
- Pour into the prepared pan and bake for 30 minutes or until a skewer inserted into the centre comes out clean.
- Cool on a wire rack and remove from pan.
- Ice with fudge frosting or serve with custard/cream.