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Shortbread Cookie Bars (that use leftover Halloween candy)

Oct 13, 2022 · 92 Comments

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These little shortbread cookie bars are just AMAZING, and they’re a great way to use up leftover Halloween candy.  Buttery shortbread cookie bars laden with candy bits make for one amazing treat!

close up cookie bar this image

If you’ve ever been stuck with way too much candy after a less busy than anticipated trick or treating day, this recipe for shortbread cookie bars is what you need!  You still get to enjoy that candy in a new fun way.  Plus, you can bake these up and give them away as gifts if you’d prefer.

Trashed-shortbread-cookie

What Halloween candy do I need for these shortbread cookie bars?

  • That’s the best part!  You can use any candy you have leftover.  Simply throw them in a food processor to get the pieces nice and small and add them to the shortbread mixture.  Read the full recipe below for the how-to.
  • For this recipe, we used 2 Reese’s Peanut Butter Cups, a ½ cup Whoppers, and ⅓ Cup Heath Bars

Trashed-shortbread-cookie-bars-ingredients

You’ll need to unwrap those little candies and they may just be the most time consuming part of this whole process!

Crushed-up-candy

Once you have your favorite candies mixed up into tiny little pieces, it’s time to add them to your shortbread mixture.

Trashed-shortbread-cookie-bars-dough

After combining the delicious leftover Halloween candy with shortbread dough, you’ll simply spread the dough and get it baked!

raw and cooked shortbread cookie bars

Right when these bars come out of oven, cut them however you’d like.  We do little triangles because it’s the perfect bite-sized treat.  Next up comes the frosting!

frosted-shortbread-bars

How long do these shortbread cookie bars last?

  • They keep very well for a few days as long as you store them in an air tight container.
  • We like to make these for an event like baby shower or game night so feel free to make them a couple of days ahead of time.

Trashed-shortbread-cookie-bars

What candy will you use in your leftover Halloween candy shortbread bars?  Leave a comment below and let us know!

And, if you’re looking for another great Halloween treat to make, try these Frankenstein cookies!

close up cookie bar

Trashed Up Shortbread Cookie Bars (that use leftover Halloween candy)

These shortbread cookie bars are a super fun way to use up all of that leftover Halloween candy you might have around the house!
4.82 from 11 votes
Print Rate
Prep Time: 15 minutes minutes
Cook Time: 20 minutes minutes
Total Time: 35 minutes minutes
Servings: 56 small triangles

Ingredients

For the bars

  • 3 sticks butter unsalted, at room temperature (1 1/2 cups butter)
  • ⅔ cup powdered sugar
  • 2½ cups flour
  • ⅓ cup cornstarch
  • 1 cup candy crushed (we used 2 Reese's Peanut Butter Cups, a ½ cup Whoppers, and ⅓ Cup Heath Bars)
  • ⅛-1/4 cup water

For the frosting

  • 3 Tbs Butter melted
  • ¼ cup milk
  • ½ tsp vanilla extract
  • 1½ cups powdered sugar

Optional

  • 1-2 Tbs sanding sugar for topping

Instructions

  • Preheat oven to 350. Line a 9x13 baking dish (I use this one) with parchment paper and set aside.
  • In the bowl of a stand mixer or with a hand mixer, beat butter for 1 minute, then scrape down the sides and add the powdered sugar and beat on low until incorporated. Scrape down the sides of the bowl and add the flour and the corn starch. Beat slowly until the dough resembles a crumbly mixture.
  • In a food processor, dump your bite-size candies in. Pulse until candies are broken up into small pieces.
    Crushed-up-candy
  • Next add the cup of candy pieces and beat until incorporated. If it is very dry and crumbly, add ⅛-1/4 cup water so that the mixture comes together.
    Trashed-shortbread-cookie-bars-dough
  • Spread/press into the prepared baking dish and bake for 20-25 minutes until golden brown on the edges. Remove from oven, and immediately lift/transfer the parchment paper and shortbread bars to a cutting board or flat surface and cut them into squares, and then cut each square diagonally.
    Shortbread-cookie-bars

To make the frosting

  • While the shortbread bars are baking make the frosting. To do so, mix all the frosting ingredients in the bowl of a stand mixer until they are creamy and well mixed together. Pour frosting over the warm, cut shortbread bars. If using sanding sugar sprinkle it on top of the frosting.
    frosted-shortbread-bars
  • Allow bars to cool completely, then separate them with a butter knife by running the knife along the lines you have already cut. Then enjoy!

Notes

The nutrition information presented on this site should be considered an estimate as the calculations will change based on the exact products you use in your own kitchen.

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Comments

  1. Brian @ A Thought For Food says

    November 4, 2014 at 10:10 am

    We have SO much candy leftover from Halloween. I made my husband bring most of it to work. We still have a small stash here. These shortbread bars are such a fabulous and fun idea!

    Reply
    • Sweetphi says

      November 4, 2014 at 2:36 pm

      Thank you so much for your comment, these shortbread bars are absolutely perfect for using left over Halloween candy in 🙂

      Reply
  2. jlampe12 says

    November 4, 2014 at 10:04 am

    Oh man, I want these so bad. They look amazing!!

    Reply
    • Sweetphi says

      November 4, 2014 at 2:22 pm

      Thank you so much!

      Reply
  3. Lynn Lovejoy from Order in the Kitchen says

    November 4, 2014 at 9:26 am

    Phi you are too adorable. I love these shortbread cookie bars and they SO fit Jessica! You are amazing lady!!

    Reply
    • Sweetphi says

      November 4, 2014 at 2:21 pm

      Awe, thank you so much girl, truly appreciate the comment 🙂

      Reply
  4. Jessica says

    November 4, 2014 at 9:09 am

    oh my gosh. THESE ARE TO DIE FOR. i can’t get over them. thank you so much!! XOXOXO

    Reply
    • Sweetphi says

      November 4, 2014 at 2:20 pm

      You’re so welcome beautiful girl, ALL the congratulations in the world as you bring your beautiful baby into this world (and I have no doubt he or she will be the snazziest kid evvvver !)

      Reply
  5. wearenotmartha says

    November 4, 2014 at 9:03 am

    Seriously, why am I not eating these for breakfast right now??

    Sues

    Reply
    • Sweetphi says

      November 4, 2014 at 2:18 pm

      These would definitely make one sweet breakfast…pun intended lol. And I have to fess up…I did have one of these cookie bars on my way to work 😉

      Reply
  6. Abby @ The Frosted Vegan says

    November 4, 2014 at 8:54 am

    haha love the story about your hubby, alllll the candy!!

    Reply
    • Sweetphi says

      November 4, 2014 at 2:17 pm

      All the candy, right? Wasn’t he being a little ridiculous? I totally made fun of him lol, but I still <3 him 😉

      Reply
  7. Liz @ The Lemon Bowl says

    November 4, 2014 at 7:02 am

    Dang girl – you know how to get down with the trashy theme!! Love this!

    Reply
    • Sweetphi says

      November 4, 2014 at 2:13 pm

      Haha thank you so much Liz, can you tell I had way to much fun with it? lol

      Reply
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Shortbread Cookie Bars (that use leftover Halloween candy)