There is no definitive answer to this question as the thickness of a shaving soap’s lather can vary depending on many factors, such as water hardness, the type of brush used, and how much soap is applied to the face. However, some soaps that are known for producing thick lathers include triple milled varieties like Taylor of Old Bond Street’s Jermyn Street Shaving Soap and Colonel Conk’s World Famous Glycerin Shaving Soap.
The lather should be billowing over the bowl if you want it to look like whipped cream. The ideal consistency is where the lather is thick enough that you can hold your brush upside-down.
How Thick Should Shaving Lather Be?
The lather should be billowing over the bowl if you want it to look like whipped cream. The ideal consistency is where the lather is thick enough that you can hold your brush upside-down without the lather falling off easily. 
Whats Better Shaving Soap Or Cream?
A quality shaving cream can produce a richer and creamier lather with great cushion and lubrication. An easier and quicker method can be achieved with the more modern process. It’s a great choice for beginners and wet-shavers alike. 
What Does A Good Shaving Lather Look Like?
It seems the best performing lather should be wet enough to have shiny soft peaks, like yogurt, as opposed to dry, stiff peaks, like whipped cream. 
What Consistency Should Shaving Cream Be?
It is possible to apply a shaving cream directly to the face with just your fingers and a little water because they are soft and goopy in consistency. For the best results, we recommend the use of a shaving brush to build a lather and prepare the skin for the shave. 
What Makes A Great Shaving Soap?
The triple milled hard soaps cost a little more, but they are usually the best shave soaps. 40 to 50% fat level is optimal for a good soap. Good lubrication and skin protection can be provided by a high percentage of fat. 
Frank Harmenstein is the lead editor of the grooming website Cut Throat Straight Razor, and has over 15 years of experience in the industry. He’s personally tested and reviewed over 200 different straight razors, and has written countless articles on the subject.