It depends. You really need a strong and powerful tool with sharp blades, as we are using frozen blueberries in this recipe. Regular liquidisers and smoothie blenders may not do the job here. But what you can do, is to add a couple of spoonfuls of Greek yoghurt to the mix and make a delicious Blueberry Frozen Yoghurt. Added yoghurt introduces more moisture into the mousse and helps with the blending if your gadget isn't powerful enough to blitz frozen blueberries on their own.