If your dip's turning out too runny, there’s a couple of things you can do. First off, be sure to drain your artichokes well with a colander.  Also, too much mayonnaise can make the dip runny. Try balancing it out with some more cream cheese or sour cream. Lastly, a bit more time in the oven can help thicken the dip. If needed, cover it with foil to stop the top from burning.