Prepare the pan: Line an 8x8 or 9x9 baking pan with parchment paper.
Melt the candy corn: Place candy corn in a microwave-safe bowl. Heat in 30-second intervals, stirring between each, until completely melted and smooth.
Add peanut butter: Stir in the peanut butter quickly while the mixture is still hot.
Add chips: Add the white chocolate or vanilla chips. Stir until melted and smooth. (If needed, microwave another 15–20 seconds.)
Pour into the pan: Spread evenly with a spatula.
Optional topping: Sprinkle crushed Butterfinger pieces over the top.
Cool: Let set at room temperature OR refrigerate for 1–2 hours.
Slice & serve: Cut into squares and enjoy.