In a large saucepan, add in the sugar, milk, and butter, Turn the burner onto medium and stir until everything is dissolved.
Measure out the peanut butter and have it ready.
Using a candy thermometer, bring the mixture up to 236-239 degrees or soft ball stage. Stir occasionally.
Remove from heat and quickly add in the peanut butter. Stir until the peanut butter is completely combined into the sugar mixture.
Pour into the pan and place into the fridge into chilled. It will probably take 30-45 minutes. Cut into small squares.
For Garnish
Microwave the coating chocolates in 20 second intervals until completely melted. Using a spoon, drizzle the chocolate over top of the fudge squares. Let the chocolate set.