Line a square tin (about 20cm) with baking paper so the rocky road is easy to lift out.
Melt the chocolate, butter or coconut oil, and maple syrup together in a heatproof bowl set over a pan of simmering water, stirring gently until smooth and glossy.
Set aside to cool for 5 minutes so it isn’t too hot for the mix-ins.
Stir in the broken oat biscuits, marshmallows, toasted coconut chips, roasted nuts, pumpkin seeds, and chopped dates until everything is evenly coated.
Tip the mixture into the lined tin, pressing it down lightly with a spatula but not too firmly so it keeps its rocky texture.
Scatter a few extra seeds, nuts and or coconut chips over the top.
Chill in the fridge for at least 2 hours until set.
Lift out, cut into chunky squares, and serve at room temperature.