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Candy Bar Blondies in a baking pan

Candy Bar Blondies

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Candy Bar Blondies are a sweet bar cookie, perfect to make when you have way too much leftover Halloween candy in your house! 

Make this easy Blondies Recipe for a post Halloween Treat! Add your favorite holiday candies for an out of this world dessert!

Candy Bar Blondies stacked on a small white plate

Candy Bar Blondies

Around the holidays, there is an influx of sweet treats to our house. On Halloween, depending on the weather, we could have 60-100 trick or treaters. I like to buy full-size candy bars, but having 40 left over makes for a big dilemma. Thank goodness I have an easy solution.

Make a batch of blondies and load them up with your favorite candies! Voila, Candy Bar Blondies! I’ve taken my favorite blondies recipe and stirred in some frozen chocolate candy bar chunks along with M&M’s. My girlfriends were dying for the recipe when I shared these. They would not lead you astray.

Candy Bar Blondies in a baking pan

What to Do with Halloween Candy Leftovers

Unsure of what to do with the leftover Halloween candy? Sampling a few of your favorites is always required, but there’s only so much your pants will stretch! Not like these treats are particularly kind to your waistline, but consider the mixing, spreading, and cutting to be a form of exercise. A batch of blondies is the perfect solution!

Tips for Making Blondies

Blondies are baked in a square or rectangular baking pan just like brownies, but without any cocoa or chocolate which give brownies their distinctive look and flavor. The name came about because blondies resemble brownies in shape when cut but are flavored with vanilla instead of chocolate. They are also called a blonde brownie. It’s interesting to note that blondie recipes appeared in cookbooks before brownie recipes.

Here are some tips for making blondies:

  • Use either light brown sugar or dark brown sugar when making blondies. I’ve made this recipe with both, but prefer dark brown sugar as it gives a richer, more caramel-like flavor and extra moisture.
  • Melting the butter makes it easier to mix the dough, plus gives a chewy texture.
  • This basic recipe can be tweaked with different add-ins. Add 1 1/2 cups of your favorites, like white or dark chocolate chips or even a combo, nuts, coconut, toffee bits, or all M & M’s.
  • Do not use a mixer to combine the ingredients. Using a mixer will over-activate the gluten and make your blondies less tender and will also add air into the batter.
  • PRO-Tip: Slightly under baking will make your blondies moist and chewy. 
  • PRO-Tip: Reserve some M & M’s and chocolate chips to carefully press onto the surface of the blondies when they come out of the oven. This will give a more finished, bakery like appearance!
Candy Bar Blondies on a square white plate

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Candy Bar Blondies stacked on a small white plate

Candy Bar Blondies

Load up your blondies with leftover holiday candies!

Prep Time 20 minutes
Cook Time 30 minutes
Total Time 50 minutes
Yield 16 bars


  • 1 1/2 cups flour
  • 1 teaspoon baking powder
  • 1/4 teaspoon salt
  • 12 tablespoons butter (1 1/2 sticks), melted and cooled
  • 1 1/2 cups light or dark brown sugar
  • 2 eggs, lightly beaten
  • 4 teaspoons vanilla extract
  • 1-1 1/2 cups chocolate based candy bars, chopped (Milky Way, Reese's, 3 Musketeers, Hershey Bars, M&M's, etc.)*See Notes
  • 2 tablespoons chocolate chips and M&M's to garnish, optional


  1. Preheat oven to 350°. Line a 9 x 9-inch baking pan with nonstick foil, leaving enough overhang to help you lift the blondies from the pan when they're done.Set aside.
  2. Whisk flour, baking powder, and salt together in medium bowl; set aside. Whisk melted butter and brown sugar together in medium bowl until combined. Add eggs and vanilla and mix well.
  3. Using a rubber spatula, fold dry ingredients into egg mixture until just combined; do not over-mix.
  4. Fold in candy bar pieces and pat batter into prepared pan, smoothing top with an offset spatula. Push in a few chocolate chips on top of dough to garnish, if desired.
  5. Bake until top is shiny, cracked, and light golden brown, 27-30 minutes; do not over-bake. Immediately after removing from the oven, push in a few more chocolate chips and/or M&M's on top of dough to garnish, if desired.
  6. Cool on a wire rack to room temperature. Remove bars from pan using foil and cut to serve.


Chop candy bars with caramel or nougat and freeze while preparing the batter and preheating the oven to prevent any over-melting.

Adapted from Cook's Illustrated.

Nutrition Information:



Serving Size:

1 bar

Amount Per Serving: Calories: 319Total Fat: 16gSaturated Fat: 10gTrans Fat: 0gUnsaturated Fat: 5gCholesterol: 51mgSodium: 169mgCarbohydrates: 41gFiber: 1gSugar: 29gProtein: 4g


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42 comments on “Candy Bar Blondies”

  1. I hear this is even an acceptable breakfast on the day after Halloween:@) Sounds good!

  2. This is a lifesaver! I’m always wondering what to do with leftover Halloween candy – thanks for the idea starters!

  3. You food always look so good, dear! All set for Halloween tmr? xoxo

  4. The texture on these blondies is perfection! 40 full sized candy bars is a ton to have hanging around the house. We always send leftovers like that to work with my Dad.

  5. Happy Birthday Liz! These delicious little blondies have all the makings for a fun Halloween leftover candy retreat. Chewy and delicious and sure to score high with the boys! Just pinned!

  6. I am such a blondies fan!! Love this idea for leftover Halloween candy!

  7. Yum! These sound delicious!

  8. Oh my goodness, Liz. Even your plebeian treats look gourmet…And yummy =) Think I’ll take a trip to Indiana the day after Halloween! Tee hee.

  9. Oh these Candy Bar Blondies will be popular in the next couple of days lol! I have not trick or treaters in my high-rise so may have to buy candies just to make the bars ๐Ÿ˜€

  10. Hi Liz, how creative, these do look delicious. Not sure if we will have any candy left, But if we do now I know what to make. Thanks!

  11. These blondies loook lovelies and delicious dear Lizzy!!

  12. That’s great! Using leftover candies to make a dessert. I really like that!

  13. Lucky kids! We’ve been getting fewer and fewer kids, this year I just bought a pack of 50 candies and I’ll likely hand out handfuls as the evening progresses. It’s rather sad because the young people cannot afford homes in Toronto (our house has nearly quadrupled in value in 15 years!) which means the neighbours kids are all university age and don’t trick or treat!

  14. blondies always make me remember the ones from my university… SO good and cantt recreate their recipe! These look decadent!

  15. I love the dense texture of these blondies…they look divine!

  16. Such a great idea to use up leftover Halloween candy. I’ll be lucky if the kids get any – I’m sitting here running to the bowl every second I get and grabbing a bar or two. Love the idea of using them up in new recipes.

  17. Looking nice! Love them โ™ฅ

  18. The perfect way to use up extra Halloween candy!! Love everything about these things.. and I know my fam will too!

  19. I am so happy to know that all that stirring and beating and washing dishes counts for something. In that case, I’ll have two!

  20. Liz, we have so much candy–it is out of control!!! I will donate a lot and use it for baking—like these bars. YUM!

  21. This is a great recipe, Liz! We all have notorious sweet teeth at my place and we would need supervision around these Candy Bar Blndies! Yum!

  22. Advantage to having no trick or treaters come to the door: I can make these.

  23. I love blondies and mixing in leftover candy sounds just fabulous to me! ๐Ÿ™‚

  24. Yum yum! These candy bar blondies look so pretty and stunning, Liz. I am such a blondies fan, so I can tell would love these too. Also love this idea of using leftover Halloween candy!

  25. Next time you can always send your leftovers to me, Liz! Hahaha! Hey dear, come join us to Win Hello Kitty Beaded Handicrafts and Mobile Phone Accessories! It’s Open to All Worldwide! xoxo

  26. These look absolutely amazing! Can’t wait to try them with my Halloween stash.

  27. I don’t think I could stop at eating just one of these!

  28. Liz, these look to die for. I am so making these with all my left over Halloween candy.

  29. I would buy a bunch of candy bars so that I could indulge in these beauties!

  30. The leftover Halloween candy? Never heard – never seen – never experienced! ๐Ÿ™‚ But these Blondie bars look and sound phenomenal that I will easily sacrifice any leftover m&m’ to make these bars!

  31. This is a great idea! I could see myself eating one too many of these!

  32. Genius way to use that leftover candy, Liz! These are AMAZING looking!! They wouldn’t last long in my house!

  33. What an awesome, perfectly timed post! Such a disappointing Halloween โ€” we had four sets of kids, so much leftover candy!

  34. Blondies + Candy? That sounds amazing and dangerous at the same time! A great way to use leftovers from Halloween! We have a HUGE bag of Skitilles left, I might need your creative mind! ๐Ÿ™‚

  35. No leftovers here! Guess I’ll have to pick up a bag of M&M’s to make these ๐Ÿ™‚ Love blondies and these look terrific!

  36. I think your girlfriends have great taste! I would not be able to stay away from these!

  37. Now you have done it. The word is out that you give out whole candy bars on Halloween. You are going to be really busy next year with all the trick or treaters. These blondies look like a great solution to the candy dilemma.

  38. Holiday season or not, my husband bakes every Sunday — his cheat day. Whatever he’s baking, it has a handful of M&Ms in the mix! He will love this recipe. ๐Ÿ™‚ ~Valentina

  39. I will check our leftover candy stash for M&Ms. If we don’t have any I don’t mind making a trip to the store.

  40. Pingback: Leftover Candy Peanut Butter Chocolate Crunch Bars – Books n' Cooks

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