1. Mix butter and sugar together, and mix together.
2. Add vanilla, and egg.
3. Then in a seperate bowl, add the flour, baking soda, and salt.
4. When done mixed together in bowl with butter, sugar, vanilla, and egg.
5. Add the milk.
6. Put in muffin cups.
7. Cook for 20 minutes.
8. Let it cool down after cooking.
9. Enjoy!