Add the buckwheat and rolled oats into a food processor fitted with the S blade attachment. Pulse until the mixture is broken down and resembles a course meal.
Add the grain mixture, cacao powder, coconut oil, and salt into the food processor with the dates. Process until combined and the mixture holds when pinched together.
Add the remaining cherries, and all other cherry layer ingredients into the blender. Blend until smooth. Once the cream layer has finished setting in the freezer, pour over the berry mixture and smooth out with a spatula.