The night before, soak the dates for the donuts in enough water to cover.
For the donuts: Add buckwheat and oats to a blender and whizz until it forms a fine flour. Drain the dates. Add all ingredients to a food processor and whizz until it is well combined. The mixture should be moist to the touch. If it is too dry, add some water then whizz again. If it is too moist, add some more coconut and whizz again. Lightly press into a donut pan or gently form into donut shapes. (Tip: the gentler you are with the mixture, the fluffier your donuts will be!)
For the frosting: Over a double boiler, gently melt the cacao butter and coconut butter. Add the raspberry puree and juice until well combined.
If you used a donut pan, remove each donut from the pan. You may need to use a knife to dig them out. Quickly spread the icing on each donut and decorate with 'sprinkles'
Enjoy immediately or set aside in the fridge in an airtight container until ready to serve.