Sieve the flour with level teaspoon of baking powder.

In a bowl put flour and rub in the margarine to a sandy texture.

Now add the sugar and mix thoroughly.

Add the beaten eggs and fold in without changing direction.

Preheat the oven.

Grease the tin and dust it.

Pour the mixture in the tin and put in the oven to bake at 400°C for 30min till it browns.