Help. I'm making this recipe and the icing is runny. What can I do to fix it. Dinner is in two hours http://food52.com/recipes/12117-red-velvet-cake

Also beat in a couple of ounces of room temperature butter.

If the refrigerator does not do the trick, you may need to add more powdered sugar. but I would taste it bc obviously the sugar will also change the sweetness. If it gets too sweet, I would suggest adding a pinch of salt and some more cream cheese

Refrigerate until it's the consistency you want. It shouldn't take long.