What are the chances that you might learn a recipe from food in wow?

According to certain foods, you can eat them to gain their recipe. Now, I’ve bought these foods on the AH, hoping to learn their recipes but it doesn’t seem to be working. What’s the percentage chance that I could learn the recipes?​A good example is Fiery Calarmari who's description reads: Use: Restores 14839 health and 0 mana over 20 sec.  Must remain seated while eating.  If you spend at least 10 seconds eating you will become well fed and gain 10 Critical Strike for 1 hour.By tasting this dish, you might obtain the recipe. via /r/wow https://ift.tt/2D0t9GE