I tested this recipe using the 6 quart IP. You could use an 8 quart as well. The important thing is that the dumplings are in a single layer. I think the 3-quart mini would be too small - but I haven't tried that one. I suppose if you roll and tuck the edges in as you roll, the dumplings might be smaller and might fit better. If you make it in a 3 quart, I'd love to hear about it.