How many calories... in a Rice Krispie treat?

I always think of Rice Krispie treats as a healthier snack than something like a candy bar because they contain fortified cereal and, well, so much air? But after making a batch recently and seeing how much butter and marshmallow goes into the pan, I have to wonder...

how many calories are in a Rice Krispie treat?

A) 100 calories
B) 150 calories
C) 250 calories
D) 450 calories


The answer is B) 150 calories, but that's only true if you follow the suggested serving size of two inch by three inch, two inch tall square. In most cases, like when you buy a Rice Krispie treat from a convenience mart or even when you're cutting up squares for yourself, the treat ends up being much larger, along with the calorie total... up to 450 calories for a big one! So choice D was actually a more realistic answer for most of us!