In a saucepan over medium heat, add the unsalted butter and peanut butter and melt, stirring until smooth and well combined.
Bring the peanut butter mixture to a boil, stirring occasionally.
Once the peanut butter mixture is achieving a steady boil then remove the saucepan from heat.
Add salt, vanilla paste and powdered sugar and mix well until incorporated, stirring continuously to avoid lumps.
Once the mixture is smooth and homogeneous, pour it into the prepared square baking dish with parchment paper, leaving an overhang for easy removal later.
Allow the fudge to cool at room temperature for about 2 hours, then refrigerate for an additional 1 hour or until set.
Once set, use the parchment paper overhang to lift the fudge from the dish. Place it on a cutting board and cut into squares.
Place the peanut butter fudge on a plate.
Serve and enjoy the irresistible goodness of homemade peanut butter fudge!
Notes
Line the Baking Dish: Line the baking dish with parchment paper to make it easier to remove and cut the treats.Consistent Mixing: Make sure to mix everything well at each step, so the result is smooth and creamy.Avoid Overheating: Take the mixture off the heat as soon as it’s smooth and well-mixed. If you overheat it, the fudge's texture might not turn out right.Sugar Addition: Gradually add the powdered sugar, stirring constantly to keep it smooth and velvety without any lumps.Proper Cooling Time: Let the fudge cool at room temperature first before putting it in the fridge. This slow cooling helps the fudge get the right texture.Cut with a Warm Knife: Dip the knife in warm water before cutting to get nice, smooth edges.