Pre-packaged muffins: 2 servings per muffin
Pint of ice cream: 4 servings
Double-stuff Oreos: ~2 cookies
Did you have ANY idea that that is the FDA-approved serving size for those items? I mean really, who stops at half a muffin? Or two Oreos?
While the US is making huge strides in its nutritional labeling, it still has a long way to go. It’s really easy to quickly glance at a label, note that the calories “aren’t too bad” and rip open the package or throw it in the shopping cart. What fewer people do is bother to see how many servings are in that same package and then consider how it’s likely to be eaten in their household.
Serving sizes came about in the 1990s, to make it easier to compare proverbial apples-to-apples, and the FDA used our portion sizes from the 1970s and 1980s, to determine a “serving.” However, as our countries growing waistlines and declining health and life expectancy are demonstrating — we are definitively eating more than we did a couple of decades ago. More food availability combined with less eating at home and busier lives has led to ungood results.
Fortunately, at the urging of the Obama administration, the FDA is once again considering re-evaluating serving sizes. It’s not only calories, but fat, sodium, and other nutritional markers individuals care about are all driven off of the magical serving size.
This week, read your labels and take note of the serving size.
And, then come back here and let me know what your biggest surprise was. I’ll put together a post with everyone’s favorite finds, and publish that later this month.

Not to be picky, but I don't think they're FDA approved. The manufacturer decides on the serving size. I'm sure they pick a size that makes the calories/fat/carbs look low.
The post source was the NYT, and all seemed quite reasonable to me. Altho, I was surprised as well: http://www.nytimes.com/2010/02/06/business/06portion.html
…Or a pint of ice cream…
related post with links to portion tests – just fyi http://www.begin2dig.com/2009/08/set-point-theory-is-crap.html(scroll down to mid post)just for ref.
I like that mc, thanks for sharing.