In a large bowl, add oats, cocoa powder, cinnamon powder and salt.
Combine everything together.
Then pour buttermilk and honey.
Give it a good mix. Cover with a lid.
Then place the bowl in the refrigerator for at least 4 hours or overnight.
Take the serving bowl or glass. Pour a layer of the chocolate overnight oats. Sprinkle some chopped walnuts and dried cranberries. Then pour another layer of oats. Add more nuts and berries. Keep repeating until the glass is full.
Garnish with more walnuts and cranberries. Drizzle honey over the top. Serve!