In a microwaveable bowl, melt the chocolate chips and peanut butter on 'high' for approximately 3 minutes (time varies according to microwave wattage).
Stir well.
Add the milk and continue to stir until well combined.
Pour mixture into a square pan (approx 8in/ 18cm) which has been lined with waxed paper.
Refrigerate until chilled (approximately 2 hours).
Turn the fudge out onto a cutting board, then remove waxed paper.
Cut into approximately 40 super-delicious and easy fudge squares.