Even that is not completely clear. What is this "intrinsic value" of a peanut butter sandwich and milk to someone who is lactose intolerant and has wheat and nut allergies?
If intrinsic value for food was measured in terms of calories that's a property that is constant regardless of any allergies or intolerances the eater might have, or for that matter what species is eating the food.
A person with a nut allergy might very well eat a peanut butter sandwich if the consequences of not injesting the calories were worse than the symptoms of their allergy.
"Might"? We were talking about intrinsic value, not subjective or possible value. And by your definition, a gallon of gas is pretty good eating.
