• Skip to main content
  • Skip to primary sidebar

The Simple, Sweet Life

menu icon
go to homepage
  • Home
  • Recipes
  • About Me
  • Subscribe
    • Email
    • Instagram
    • Pinterest
    • TikTok
  • subscribe
    search icon
    Homepage link
    • Home
    • Recipes
    • About Me
    • Subscribe
    • Email
    • Instagram
    • Pinterest
    • TikTok
  • ×
    Home » All Desserts » By Holiday » Halloween

    Published: Sep 19, 2022 · Modified: Aug 29, 2023 by Claire

    Frankenstein Halloween Rice Krispie Treats

    Jump to Recipe·Print Recipe·★★★★★5 from 1 review

    These Halloween Rice Krispie treats are the perfect last-minute addition to your dessert line-up - Fast, easy, and made from just a few store-bought ingredients.

    halloween rice krispie treat decorated with candy melts/sprinkles to look like frankenstein leaning against a glass of milk with a light green pumpkin, green candles and more rice krispie treats in the background.

    Halloween may be my favorite time of year, but it always ends up being one of the busiest - and somehow it just seems to slide right into the chaos of Thanksgiving and Christmas.

    So if the thought of decorating the house, planning and/or making the kids' costumes, organizing the trick-or-treat group or Halloween party on top of everything else going on in your life has you thinking "Arggggh everything is happening all at once plz make it staaaaap", this post is for you.

    These Halloween Rice Krispie treats are not only delicious (uuuummm, marshmallows anyone?), easy and made from just a few store-bought ingredients, but perfect for enlisting your kids' help to make.

    Baking Halloween memories? These are the best kind.

    Jump to:
    • Ingredients
    • Watch the process
    • How to make Halloween Rice Krispies
    • Expert tips
    • Storage
    • Frequently asked questions
    • More last-minute Halloween treats
    • Recipe

    Ingredients

    Below are a few tips and tricks (the good kind, I promise) for these treats. A full list of ingredients and their measurements is available in the recipe card.

    • Butter: I recommend using room-temperature butter cut into pieces, which will reduce the splatter and ensure it melts evenly. For an elevated twist, try browned butter rice krispies.
    • Marshmallows: Mini marshmallows work best because they melt evenly and faster than large ones.
    • Rice Krispie cereal: Any crispy rice cereal will work well for this recipe. Honestly, any cereal makes for delicious dessert bars (as evidenced by these cinnamon toast crunch bars).

    Watch the process

    How to make Halloween Rice Krispies

    rice krispie treats in a glass casserole dish with blue silicone webbing around the outside.

    First, make the rice krispie bars.

    Melt butter over low-medium heat. Add the marshmallows and cook until melted.

    Remove from heat, add the cereal and stir to coat.

    Press into a 9" x 13" buttered dish.

    rectangularly sliced rice krispie treats of various sizes on a gray backdrop.

    Second, prepare the bars and candy melts.

    Once firm, slice the rice krispies into rectangles of various sizes.

    Place the candy melts over a bowl of simmering water, stirring until smooth.

    rice krispie treat on a gray background dipped in green candy melts and black sprinkles with bowls of candy melts, royal icing eyes and sprinkles around it.

    Finally, decorate.

    Dip the top of each rice krispie treat into the green candy melts and then into the black sprinkles.

    Add two royal icing eyes and place on a cooling rack to set.

    frankenstein decorated rice krispie treat next to a bag of black candy melts and royal icing eyes.

    Melt a handful of black candy melts, pour into a piping bag, and pipe stitches onto your treats.

    Allow to set completely before packaging.

    Expert tips

    • Cooking rice krispie treats: Make sure to cook your butter/marshmallows over low-medium heat and to remove them from the heat immediately once melted to avoid overcooked, hard bars.
    • Keep your kitchen equipment/utensils free of water when melting the chocolate. Getting water in the melting/melted chocolate will cause it to seize.
    • Using chocolate in place of candy melts: You can use white chocolate with green oil-based food coloring and dark chocolate with black food coloring to replace the candy melts.
    • Don’t have a double boiler? You can melt your chocolate in the microwave using 10-second increments. Just be careful, it’s very easy to overcook chocolate this way.
    • If the chocolate is too thick: You can thin it by adding a little bit of vegetable shortening. Stir a little bit in, stirring until it’s completely melted, and test to see if it’s the consistency you want. A little bit goes a long way.
    partially eaten rice krispie treat next to a glass of milk, a bowl of royal icing eyes and whole rice krispie bars.

    Storage

    Rice Krispie treats can be stored in an air-tight container at room temperature and are best when eaten within three days.

    Frequently asked questions

    What can I use instead of marshmallows in Rice Krispies?

    If you don't have marshmallows on hand or would prefer not to use marshmallows, peanut butter and honey (or maple syrup) make an excellent substitute. For a recipe of this size you'd need ¾ cup peanut butter and ¾ cup honey (or maple syrup).

    Why do my Rice Krispie treats get hard?

    Rice Krispie treats can harden as they go stale, but if they're fresh, overcooked marshmallows is the most likely culprit. Be sure to cook your marshmallows over medium (or even low) heat and immediately remove them from your stovetop once they've melted.

    Why are my Rice Krispie treats not sticking together?

    Did you know that the best Rice Krispie treats require a fresh bag of marshmallows? If you used an old bag, the stale marshmallows may have dried out just enough to keep your treats from sticking together.

    Do Rice Krispie treats need to be refrigerated?

    No, Rice Krispie treats can be stored at room temperature, but if you need them to last more than a few days, you can freeze them. Wrap each square and freeze them for up to three months.

    More last-minute Halloween treats

    Don't have a lot of time on your hands? Here are a few of my favorite Halloween treats that can be made with a minimal amount of mostly store-bought ingredients.

    • close-up overhead shot of a piece of plated spider candy bark
      Spider Candy Bark
    • stacked brownies next to a glass of milk
      Halloween Monster Brownies
    • bowl of icing, forks, plate of pop tart ghosts and sprinkles are laid out around the frame of the photo
      Pop Tart Ghosts
    • three witch hat cupcakes on a plate with a skull and another cupcake in the background
      The Easiest Witch Hat Cupcakes

    Did you make this recipe? Please leave a ⭐ star rating and let me know how it went in the comments below! I regularly update these posts and feedback from wonderful readers like you help me improve them.

    Print

    Recipe

    Frankenstein Halloween Rice Krispie Treats

    Overhead view of multiple frankenstein rice krispie treats on a white background.
    Print Recipe

    ★★★★★

    5 from 1 review

    These Halloween Rice Krispie treats are fast, easy and made from just a few store bought ingredients.

    • Author: Claire Coffey
    • Prep Time: 20 minutes
    • Setting Time: 30 minutes
    • Cook Time: 10 minutes
    • Total Time: 1 hour
    • Yield: 12 1x
    • Category: Dessert
    • Method: Cooking
    • Cuisine: American

    Ingredients

    Units Scale
    • 6 cups rice krispie cereal
    • One 10oz bag mini marshmallows
    • 4 tbsp unsalted butter
    • 10 oz green candy melts
    • 3 oz black candy melts
    • Royal icing eyes
    • Black jimmies sprinkles

    Instructions

    1. Butter a 9" x 13" casserole dish.
    2. In a large pot over low-medium heat, melt the butter.
    3. Add the marshmallows and stir until smooth.
    4. Pour in the rice krispie cereal and, with a spatula, stir until the cereal is evenly coated with marshmallows.
    5. Spoon the mixture into the prepared casserole dish and press until the rice krispies fill the dish and the top is flat.
    6. Allow to set for 30 minutes.
    7. Remove the cooled rice krispie treats from the dish and cut into rectangles of various sizes.
    8. Place a bowl over a small pot of boiling water and add the green candy melts to it.
    9. Stir until melted. If the chocolate is too thick for dipping, adding a teaspoon of vegetable shortening.
    10. Dip the top of each rice krispie treat into the green candy melts and then into the black jimmies sprinkles.
    11. Add two royal icing eyes.
    12. In a small bowl, melt the black candy melts in the microwave using 10 - 15 second increments.
    13. Pour into a piping bag and pipe stitches onto the treats.
    14. Allow to set completely before packaging.

    Notes

    • Cooking rice krispie treats: Make sure to cook your butter/marshmallows over medium heat and to remove them from the heat immediately once melted to avoid overcooked, hard bars.
    • Keep your kitchen equipment/utensils free of water when melting the chocolate. Getting water in the melting/melted chocolate will cause it to seize.
    • Using chocolate in place of candy melts: If you'd prefer to use chocolate in place of the candy melts, you can use white chocolate with green gel food coloring and dark chocolate with black gel food coloring to replace the green and black candy melts.
    • Don’t have a double boiler? You can melt your chocolate in the microwave using 10 second increments. Just be careful, it’s very easy to over-cook chocolate this way.
    • If the chocolate is too thick: You can thin it by adding a little bit of vegetable shortening. Stir a little bit in, stirring until it’s completely melted and test to see if it’s the consistency you want. A little bit goes a long way.
    • Storage: Rice krispie treats can be stored in an air tight container at room temperature and are best when eaten within three days.

    Nutrition

    • Serving Size: 1 rice krispie bar
    • Calories: 336
    • Sugar: 37.8g
    • Sodium: 177mg
    • Fat: 13.3g
    • Saturated Fat: 10.9g
    • Carbohydrates: 52.7g
    • Fiber: 0.1g
    • Protein: 1g
    • Cholesterol: 10mg

    Keywords: halloween rice krispie treats, halloween rice krispie treat recipe, easy halloween treats, halloween rice krispies, halloween rice crispy treats, halloween food ideas

    Did you make this recipe?

    Tag @thesimplesweetlifeblog on Instagram and hashtag it #thesimplesweetlife

    More Halloween Treats

    • black cat cupcakes arranged against a white backdrop next to a bowl of sprinkles, a pairing knife with a light wood handle and a bowl of cut up Oreo cookies.
      Black Cat Cupcakes
    • graveyard cupcakes on plates surrounding by sprinkles and off-white pumpkins against a dark green backdrop.
      Graveyard Cupcakes with Meringue Ghosts
    • bat doughnuts on a gray background with a bowl of black sanding sugar.
      Halloween Bat Doughnuts
    • straight on shot of cake pops in a jar with halloween decorations in the background
      Easy Halloween Monster Cake Pops

    Reader Interactions

    Comments

      Leave a Reply Cancel reply

      Your email address will not be published. Required fields are marked *

      Recipe rating ★ 5 Stars ☆ ★ 4 Stars ☆ ★ 3 Stars ☆ ★ 2 Stars ☆ ★ 1 Star ☆

    1. Sue says

      September 19, 2022 at 9:10 pm

      Super cute, easy and delicious !

      ★★★★★

      Reply

    Primary Sidebar

    woman with long brown hair, half up in a bun, sitting in front of an open refrigerator eating a cookie with a white and orange cat.

    I'm Claire, the baker, blogger, and general sprinkle enthusiast behind The Simple, Sweet Life. Whether you like simple sweets, comfort (baked) foods, or works of sugar art, you're sure to find something here to sweeten your day!

    More about me →

    Popular

    • overhead view of fluffernutter brownies on a cooling rack
      8 Ways to Upgrade Your Boxed Brownie Mix
    • Side and slight top view of a heart shaped cake with different shades of pink frosting piped onto the sides and top.
      Vintage Heart Cake
    • a variety of cakes decorated with flowers.
      How to safely use fresh flowers on cakes
    • 10 Things I Wish I Knew About Cookie Decorating

    Fall Favorites

    • Frosted spice cake on a clear cake stand with while bowl, a jar of caramel, two taper candles and a small stack of white plates in the background.
      Krydderkake (Norwegian Spice Cake)
    • Close up of rice krispie treat being pulled in two with thick strings of marshmallow stretching between the halves.
      Browned Butter Rice Krispie Treats
    • Three maple cookies on a small parchment paper-lined silver cooling rack. Around them are a glass of milk, a bowl of glaze, plates and a small bowl of pecans.
      Maple Cookies
    • Cranberry apple crisp with a scoop of melting ice cream on a light blue striped towel. Plates, a bowl of frozen cranberries, and ice cream scoop and a white bowl are nearby.
      Cranberry Apple Crisp

    Footer

    ↑ back to top

    Quick Links

    About
    Privacy Policy
    Contact

    Recipes

    Scandinavian baking
    Cakes
    Cookies
    Pies and tarts
    Brownies and bars
    Breakfasts

    Follow

    Instagram
    Pinterest
    TikTok

    As an Amazon Associate I earn from qualifying purchases at no cost to you. Purchases from these links helps support this blog so I can keep creating the free recipes you know and love. All affiliate links are clearly marked.

    Copyright © 2023 The Simple, Sweet Life