Preparation of the Pan: Initiate by lining an 8-inch square pan using foil. Subsequently, apply a generous amount of butter to the foil to prevent adhesion. Set it aside for subsequent use.

Milk and Sugar Combination: In a medium-sized saucepan, combine the milk and sugar. Allow the mixture to come to a boil and let it simmer for a duration of 4 minutes.

Incorporation of Peanut Butter and Marshmallow Cream: Post the boiling of milk and sugar, introduce the peanut butter and marshmallow cream to the saucepan. Ensure thorough mixing until the constituents are uniformly combined.

Transfer to Pan: With diligence, pour the resultant mixture into the previously prepared pan.

Setting: Place the pan in a refrigerator and allow the mixture to set until it achieves the desired firmness.

Final Step: Once firmly set, use a sharp knife to cut the fudge into even squares.