In a medium saucepan, combine peanut butter, butter, sugar, and evaporated milk. Cook over medium-high heat, stirring constantly, until the sugar is dissolved and the mixture is smooth.
Remove from heat and stir in the vanilla extract. Pour the mixture into a greased 8x8 inch pan.
Let the fudge cool and set before cutting into squares.
Interesting Facts
This peanut butter fudge is a classic American treat.
Peanut butter fudge was introduced in the early 1900s.
This fudge is easy to make and requires very few ingredients.