I like to use a hand-held immersion blender as this is the quickest, easiest, and safest method.  As well, it means less washing up. However, you will get a smoother, creamier texture if you use a blender. But please be aware, it is important to realise that blending hot liquids in a blender can be dangerous and could result in severe burns. If you do use a blender for hot liquids, you must be careful. You will need to remove the central cap in the blender lid and then cover the lid with a folded tea towel to let the steam escape. Hold the lid on securely and blend on a low speed. This will allow steam to escape so that it doesn’t build up. If you don’t, there is the risk that soup may overflow out of the blender.