In a jar or bowl, mix the oats, chia seeds, cocoa powder, and a pinch of salt until there are no cocoa clumps.
Add the milk, yogurt, vanilla, and honey. Stir well until smooth and evenly combined.
Adjust thickness: add a splash more milk if it looks too thick.
It should be pourable but not watery.
Cover and refrigerate for at least 4 hours, ideally overnight.
In the morning, give it a quick stir. If it’s thicker than you like, loosen with 1–2 tablespoons of milk.
Top with chopped Crunchie bar or honeycomb pieces just before eating so they stay crisp.
Optional: Add banana slices, a drizzle of peanut butter, or a sprinkle of mini chocolate chips for extra flair.