1. Preheat oven to 350 deg F. 2. Melt margarine in a baking pan in the oven. 3. Sprinkle crumbs evenly over the margarine. 4. Top evenly with coconut followed by the milk. 5. Bake for 25 minutes or until lightly browned. 6. In the meantime, melt chips with peanut butter in a small saucepan. 7. Spread evenly over the hot coconut layer. 8. Cool for 30 minutes. 9. Chill and cut into bars. 10. Store loosely covered at room temperature.