Heat the mixture, stirring occasionally, until it comes to a boil. Once boiling, set a timer for 2 1/2 minutes. Keep the mixture at a steady boil during this time to ensure the fudge sets properly.
Step 3: Add Peanut Butter and Vanilla
Remove the pot from heat and quickly stir in 3/4 cup of peanut butter and 1 teaspoon of vanilla extract. Mix until the peanut butter melts and the mixture becomes smooth and creamy.
Step 4: Pour into Prepared Dish
Grease an 8×8-inch dish with butter or non-stick spray. Pour the hot fudge mixture into the dish, spreading it evenly with a spatula.
Step 5: Cool and Serve
Allow the fudge to cool at room temperature for at least 1 hour. Once set, cut into squares and enjoy!
