1. Crush graham crackers in a food processor. In a separate bowl, add walnuts, coconut, and peanut butter. Stir in crushed graham crackers.
2. Slowly add the milk and mix. If mixture does not hold together, continue adding additional milk until all the ingredients stick together. However do not make it too soft, and if necessary, use your hands.
3. Spread mixture evenly into a 9x9 nonstick baking dish.
4. In a saucepan, melt chocolate chips together with the milk alternative over medium heat. Stir until smooth.
Spread chocolate mixture on top of peanut butter mixture. Refrigerate for 1 hour or until hardened. Cut in squares and enjoy.