Chocolate stains are not permanent as long as the chocolate stains are treated promptly.
However if the chocolate stains are not treated quickly enough and are allowed to set in the chocolate stains could become permanent or at least be harder to get out fully.
With prompt treatment and with the right methods including scraping off any excess chocolate and flushing with cold water and using a stain remover and detergent you can get most chocolate stains out.
The best thing to do to get chocolate stains out of fabric is to act quickly and remove the chocolate stains as soon as it occurs if possible.
Use a dull knife or spoon to scrape off any excess chocolate from the fabric.
Then flush the chocolate stain with cold water and work from the back of the fabric to the front of the fabric to prevent pushing the chocolate stain in deeper.
Apply a stain remover or small amount of laundry detergent directly to the chocolate stain.
And wash the fabric in cold water using the correct detergent for the certain fabric type.
And only dry the fabric or clothing once the stain has been removed as drying the fabric or garment with the stain still in it can cause the stain to set in.
For older or more stubborn chocolate stains you may need to use a specialized stain remover.
You can also remove chocolate stains by making a paste of baking soda, dish detergent and hydrogen peroxide.
Scrub the paste into the fabric gently with an old toothbrush and wait a few minutes or so and then run it under cool water.