Vanilla Processor Cake

This is a cake recipe that I've come up with based on a number of different recipes. I make it in the Thermomix, but it can be made in a food processor or even a normal mixer.
It will make one large cake suitable for a small baking dish, 2 smaller cakes or around 24 large patty cakes.
If no buttermilk is available, sour some milk by warming gently in the microwave and adding lemon juice. The acidic liquid is required to activate the bi-carb soda.
I add lecithin to my mixture, but it's not absolutely necessary. It just stops it looking curdled and makes for a smoother cake.
Lecithin is available from pharmacies and health food stores. It's made from soya beans and is an emulsifier.

Vanilla Cake
260g raw sugar
170g Dairy Soft
4 eggs, room temperature
300g plain flour
40g custard powder
2 tp baking powder
1 tsp bi-carb soda
1 cup buttermilk or soured milk
2 tsp vanilla
1 tsp lecithin (optional)

Blitz sugar to make into castor sugar.
Add butter blend and mix at speed 4 for 30 seconds.
Add eggs one at a time, beating at speed 4 and adding 3 Tbsp of flour mixture with the last egg to prevent curdling.
Add milk and flours and blend at speed 2 up to 4 until incorporated. Blend until smooth.

Bake at 160C for 1 hour in a small baking dish, 25 - 30 minutes on 200C for large patty cakes, 40 minutes at 180C for two smaller round cakes.

Vanilla Frosting
100g softened butter
200g icing sugar
1 Tbsp Custard Powder
2 - 3 Tbsp cream or milk
2 tsp vanilla
2 Tbsp glucose (optional)

Blend butter, sugar and custard powder on speed 3 until smooth.
Add cream, essence and glucose. Continue blending until smooth and creamy.