Recipes

I'm editing a book where the author uses the term "recipes" in a way I'm not familiar with.

Here is an example (not copied straight from the text): "Jane has two gallons of milk. The recipe for pudding she is using asks for 2 cups of milk. How many recipes can Jane make?"

I flagged it and asked if it shouldn't be "How many batches of pudding can Jane make" instead, and explained that if I were asked "how many recipes can you make" I would say something along the lines of "well hey, I can use milk in pudding, cookies, and macaroni, so 3." But the author went with the original phrasing.

I'm a West Coast denizen; I'm not sure where the author lives (except that it's probably somewhere in the States). Is this a commonly accepted usage? Is it specific to a region? Or widespread?