Crush the Weet-Bix into a bowl or meal prep container and mix in the espresso powder. Add the milk and stir. Press the mixture firmly into the base of the bowl or container.
Allow the mixture to sit for 2 minutes or until the liquid has absorbed. Top the Weet-Bix with the yoghurt. You can add protein powder to the yoghurt for higher protein content.
Using the back of a spoon smooth the top of the yoghurt. Place in the fridge for an hour or overnight.
Sift hot chocolate powder or cocoa powder over the yoghurt before serving.