Microwave butter for 30 seconds until very soft. Mix well with sugars

Add the vanilla essence and the egg and mix well

Once mixed, add in the flour slowly, and parts at a time. DONT mix very strongly, as if you mix it with a wisk for example it will mix unwanted air into dough and it will come out like muffins.

Once the dough is mixed ( for extra mix I would hand mix for a minute or two.)

Refrigerate dough for at least an hour, the butter will harden the dough and it will have to be scooped out or you can leave it for a few Mins to soften. RECOMMEND refrigerating over night.

Heat up oven to 355 Fahrenheit or 180 Celcius

Depending on the type of cookies you want, for flat cookies just make them into small balls of dough and place onto baking tray. If they spread out a lot it is fine as you can just cut them into squares when its done .

For cake shaped cookies put into a muffin tin or a mould of your choosing

After about 15 mins, less if you like them soft, take them out and let them cool for a while, they will firm up. Dont worry if they look too soft when taking them out, they firm up quite a bit when. They are out of the heat.