“Yikes! Hot chocolate stains are no fun, but you should be able to get it out with ease.
You’ll have to work quickly with this, so follow the directions below ASAP:
Create a solution with 1 cup of warm water and 1 tablespoon of detergent (either car upholstery cleaner or dish soap is great!).
Wet a clean rag with cold water, and gently blot the excess liquid area. Follow up with a dry paper towel.
Use a damp towel to apply the mixed detergent. Again, blot DON’T rub.
Apply white vinegar to the area, blotting with a paper towel.
Apply water with a sponge or towel and dab the area.
Blot dry with a clean rag.