Method

• 01
  Gather the ingredients. Prepare an 8x8-inch pan by lining it with aluminum foil and spraying the foil with nonstick cooking spray.
• 02
  Place 4 ounces (about 2/3 cup) of white chocolate chips in a large microwave-safe bowl. Microwave until melted, about 1 1/2 minutes, stirring halfway through the cooking time.
• 03
  Stir until the chocolate is a smooth paste. Once the chocolate is smooth, add approximately 1/3 of the frosting and a few drops of yellow food coloring. Stir to combine and adjust the coloring amount until you get a yellow.
• 04
  Pour the yellow fudge into the prepared pan and refrigerate until mostly set about 30 minutes. The fudge does not have to be rock-hard but should be set enough so that it doesn’t move when the pan is tilted.
• 05
  Repeat steps 2 and 3 using orange food coloring. If you don’t have orange coloring, use yellow and red color in a 2:1 ratio.
• 06
  Pour the orange-colored fudge over the yellow fudge, smooth it in an even layer, and return to the refrigerator to allow the new layer to set.
• 07
  Repeat steps 2 and 3 once more, this time omitting any food coloring so that the top layer is white. Pour the white fudge over the orange layer and return to the refrigerator once more.
• 08
  After it has set for about 10 minutes, lightly score it into 1-inch squares, and press a candy corn into the center of each square. Return the fudge to the refrigerator and allow it to set fully about 2 hours.
• 09
  To serve, cut the fudge into 1-inch squares.