In a medium size bowl, stir together the overnight oat ingredients. Cover and leave for 3 hours or overnight.
Add the biscoff spread to a small bowl or ramekin with the coconut oil, and heat in the microwave for 20 seconds. Stir until its runny.
Layer up the overnight oats with a layer of the mashed raspberries, then top with the melted biscoff mixture. Sprinkle over a little crumbled biscoff biscuit and let the topping set in the fridge for a few minutes to harden. Enjoy!