Albert Barnes Commentary 2 Kings 4:41

"But he said, Then bring meal. And he cast it into the pot; and he said, Pour out for the people, that they may eat. And there was no harm in the pot." — 2 Kings 4:41 (ASV)

Then bring meal - The natural properties of meal would only slightly diminish either the bitterness or the unwholesomeness of a drink containing colocynth. It is evident, therefore, that the conversion of the food from a pernicious and unsavory mess into palatable and wholesome nourishment was a miracle.