In three small mixing bowls, add 2 oz.(for white part), 3oz. (for orange part). and 3 oz.(for yellow part) of cream cheese to each bowl. Add feta and onion powder to the 2 oz. of cream cheese and mix well. Finely grate cheddar cheeses and add the sharp cheddar to one of the bowls with 3oz. of cream cheese, add paprika and mix until well combined. Add the white cheddar and turmeric or mustard powder to the other 3 oz. bowl and mix until well combined. (Optional: Add a few drops of food coloring to intensify the orange and yellow if desired)
Place plastic wrap in each well of the taco holder and press a small amount of the white cheese mixture to the bottom of the taco holder to create the tip of the candy corn. Repeat with the other two wells of the taco holder. Freeze for 30 minutes.
Remove from freezer and remove the frozen cheese layer and set aside. Place a clean layer of plastic wrap into the taco holder and unwrap the frozen cream cheese layer and place it in the new plastic wrap. Press orange cream cheese mixture into taco holder to create the next layer of the candy corn. Fold over plastic wrap and press to ensure the cheeses mold together. Freeze for another 30 minutes. Repeat the same process of unwrapping and using new plastic wrap with yellow layer and freeze for about 45 minutes or until all the cheeses are firm.
Cut the nearly frozen candy corn cheese log into thin slices and place slices on a parchment lined cookie sheet and freeze slices until ready to serve. When ready to serve, place frozen candy corn cheeses on crackers.