Boil or steam for about 15 minutes, or until soft enough to pierce with a fork, and drain
Mash the sweet potatoes with a fork
Once cooled, transfer the mash into a freezer-friendly container and place in freezer until completely frozen
Place the frozen mash into your blending device of choice along with the yogurt, cocoa powder and maple syrup
Blend until it forms a thick ice-cream-like texture – you will probably have to mix it around a few times during this process to make sure it’s all evenly blended