1. Line an 8×8-inch pan with parchment paper, leaving enough overhang to lift the fudge out easily later.

2. Add the butter, light brown sugar, granulated sugar, and evaporated milk to a medium saucepan over medium heat. Stir constantly until the butter melts and the mixture becomes smooth.

3. Bring the mixture to a gentle boil and keep stirring for 4 to 5 minutes so it thickens slightly.

4. Remove the pan from the heat and stir in the creamy peanut butter, vanilla extract, salt, and white chocolate chips until the mixture is completely smooth.

5. Pour the fudge into the prepared pan and spread it evenly.

6. Sprinkle the Christmas sprinkles or holiday candy pieces over the top and gently press them into the surface.

7. Refrigerate for at least 2 hours, or until fully set.

8. Lift the fudge from the pan, slice into squares, and serve.