Halloween Rice Krispie Treats (with Chocolate Peanut Butter)

Here’s a Halloween version of your favorite Scotcheroos! Peanut Butter Rice Krispie Bars with an iced spider web!

A large piece of Halloween Rice Krispie Treats with 2 fake spiders.

Hello Friends! Here is a classic with a holiday twist: Halloween Rice Krispie Treats with a delicious choc peanut butter topping.

This recipe is perfect to add to a party dessert table if you are entertaining this season.

Click here for a thinner classic version, Chocolate Peanut Butter Rice Krispie Bars.

Halloween Scotcheroos Bars

Today, I am giving the traditional Scotcheroo a spooky upgrade by weaving an iced spider web through its chocolate topping. 

What is a Scotcheroo?

Peanut Butter Rice Krispie Bars are also called Scotcheroos. They are a dessert bar with a Kellogg’s Rice Krispie peanut butter bottom and a creamy chocolate butterscotch topping.

They’re called a variety of names, such as K-bars, Rice Krispie Treats, and Scotcheroos, but one thing is consistent: they are seriously delicious. Try to just have one!

In this recipe, the bars are slightly thicker than my Choc Peanut Butter Rice Krispie Bars Recipe, but otherwise, they are very similar.

With my shortcut icing method, these have only seven ingredients and take less than an hour, including decorating time.

I used white Betty Crocker Cookie Icing (affiliate link) for the piping, but a homemade frosting would work the same.

Next, try these Halloween chocolate sugar cookies; then make these adorable reindeer rice krispie treats for Christmas.

Halloween Rice Krispie Treats Ingredients

Here’s what you’ll need. Affiliate link in color.

Granulated Sugar
Karo Light Corn Syrup
Peanut Butter
Kellogg’s Rice Krispies Cereal
Chocolate Chips
Butterscotch Chips
Betty Crocker Icing Tube HERE

How to make a Spider Web with Icing

Below is my process for frosting a spider web on your dessert. This method works equally well on cake, cupcakes, or cookies!

If you have never done this before, it’s probably a good idea to practice first on a sheet of parchment or wax paper. It’s easy. You will quickly get the hang of it!

First, smooth out a small coat of melted chocolate on your parchment surface to test. Next, knead the tube of piping according to the directions on the package. Do not skip this!

After playing around a bit, I found the easiest method with the best results was first to draw a spiral with the white piping.

Start in the center and move outward in a circular motion. Now, pull your “spokes” out from the center with a decorating tool, toothpick, or chopstick.

Create a few webs to test. It’s fun!

Tips to Pipe a Spider Web

If you are using a decorating tube, it is very important to knead the package as it suggests. This makes the blending so much better!

Also, I chose to make the piping line a little wider for this particular product to give the spider web more definition. This created a better web effect.

I chose the middle line width by cutting the tip at the halfway mark. (You will know what I mean when you see it.) 😁

Be sure that your chocolate base is still soft enough to “move.” You’ve got a little window of time before it hardens, so don’t panic. LOL. But it improves the look of your web to get both frosting colors to flow together.

I found that the web stays cleaner and more precise when you wipe off the end of your decorating tool after you “pull” out each spoke.

The same method can be used with frosting or ganache. You will get a much smoother glossier finish with ganache.

And here is the recipe. Enjoy. It’s really as fun to make as it is to eat.

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Halloween Rice Krispie Treats with 2 fake spiders.

Halloween Rice Krispie Treats

  • Author: Cindy Munson
  • Total Time: 20 minutes
  • Yield: 24 bars 1x


Halloween Rice Krispie Treats are delicious and very easy to create; perfect for a Halloween party dessert menu.



1 cup Karo light corn syrup

1 cup granulated sugar

1 cup peanut butter

6 cups Kellogg’s Rice Krispies cereal

8 ounces chocolate chips (1 cup)

8 ounces butterscotch chips (1 cup)

1 tube Betty Crocker Cookie Icing, White


  1. Line a 13 x 9-inch pan with parchment paper or lightly spray with cooking spray. Set aside.
  2. Combine the sugar and corn syrup in a large saucepan over medium heat. Stir frequently. When the mixture begins to boil, remove it from the heat. (Approximately 1-2 minutes)
  3. Stir in peanut butter. When blended, mix in the cereal. Fold together until well coated. While the mixture is still warm, press into the bottom of the pan. It will get harden as it cools.
  4. When cool and firm, lift the bars out of the pan by holding on to the parchment paper ends on each side.
  5. Melt the chocolate and butterscotch chips using a microwave or a double boiler. Stir frequently. When melted, pour over the bars. Spread evenly with a spatula.
  6. Next, prepare the icing tube. Knead it, according to the directions on the package, to soften it.
  7. To create a spider web design, use the icing tube to pipe a spiral on top of the chocolate. Start in the center and move outward in a circular motion. Pull your “spokes” out from the center with a decorating tool.
  8. Let harden before cutting into squares. Enjoy!


Do Not Overcook. The bars will be stiff and chewy if you cook too long. Add the peanut butter to the sugar mixture shortly after the sugar melts into the corn syrup.

Important. Knead the tube of icing to get the proper consistency for the spider web design.

  • Prep Time: 20 minutes
  • Category: Desserts
  • Method: Boiling
  • Cuisine: American

Keywords: Kellogg’s, Rice Krispies, bars, peanut butter, chocolate, butterscotch, chocolate desserts, game day, game day dessert, game day treats, holiday bars, midwest recipes, MN game day, no-bake

Recipe Card powered byTasty Recipes

Nutrition Label. The nutritional values listed are an approximation based on the ingredients in the recipe card. Actual amounts may vary.

How do you Make Desserts look Better?

Here are a few ideas that may help your dessert bars look more professional and tidy.

Use a sheet of parchment underneath the bars so it is simple and quick to remove them from the pan when decorating. 

You could also use wax paper or aluminum foil. Because they do not require baking, you have a lot more options with liner products.

When ready to slice, use a large sharp knife and cut across a large section at a time to create even-sized pieces.

Cut half the 13 x 9-inch rectangle and ice a web on both pieces. You could also do just one huge web on the whole pan.

Once you perfect your spider web design, there’s no stopping you, Halloween Queen! 😃

Have fun, and let me know how it goes!


More Easy Dessert Recipes

Below are more delicious, sweet recipes to try!

Quick Blueberry Crumble Pie
Easy Chocolate Cake
Scotcheroo Bars
The Best Ever Chocolate Chip Cookie

Mini Chocolate Cream Puffs
Easy Baked Chocolate Pudding Brownies
Red White and Blue Desserts
Healthy Oatmeal Bars with Chocolate Topping
Caramel Corn with Chocolate

All Dessert Recipes

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7 comments on “Halloween Rice Krispie Treats (with Chocolate Peanut Butter)

  1. 👻 Spooky scotcheroos…what could be better? Thanks for inspiring me to make these delicious treats and share them with friends for a fall festival. They were a hit and I only got one! Now I need to make a pan for myself! LOL! 🍁🎃👻

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