Butter Bar

Preheat the oven to 180°C (356°F).

In a bowl, cream together the butter and sugar.

Add the egg and mix well.

Sift in cake flour and salt, then knead the dough.

Spread the dough evenly in a baking pan.

Bake in the oven at 180°C for 20 minutes.

Let it cool, then cut into bite-sized pieces.