In a liquid measuring cup, whisk together the chicken stock and sourdough discard until smooth. Slowly pour the stock mixture, then add the heavy cream and chicken. Season with salt, pepper and parsley. Bring to a boil, then lower the heat to a gentle simmer.
1380 grams chicken stock, 70 grams sourdough discard, 1/2 pound cooked chicken, cubed or shredded, 130 grams heavy cream, 9 grams salt, 1 gram black pepper, 1 grams dried parsley