I want to make Nutella cookies. I've found a recipe for it, but it's in volume measurements. It asks for a cup of Nutella and I don't own a cup.  I tried searching my regular converters, but the only one with a hit was Wolfram-Alpha and I've noticed this result can be quite wrong.  Is anybody kind enough to weigh a cup of Nutella? Or do you use a converter that knows the weight of a cup of Nutella?  Note: I do own a tablespoon measure, so if nobody knows, I'll just scoop out some and calculate it myself. And post it as an answer of course. 
I actually measured and weighed a cup of Nutella and I got 290g. Of course we have to take into consideration my 1 cup measurement (I'm pretty sure they are not exactly the same) and my scale. But it just shows that the 300g mark is not far off. 