This is a great recipe. I have made my own High Efficiency laundry soap for years. I do not add any essential oils to mine since to me that is the beauty of making my own, being able to have the soap without perfumes.
Yes, it is liquid when you are done. It is super easy to make and very inexpensive. I like to add a "blueing" agent to mine as this helps keep the whites to stay white better. I use Mrs Stewart's Unscented Laundry Whitener.