Halloween Candy Leftover Cookies

A fabulous cookie using all your leftover Halloween treats!
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Leftover Halloween Candy Cookies in a blue plate

Just a quickie recipe today! I hope everyone had a fabulous Halloween, we sure did!

What to Do With Leftover Halloween Candy

These Leftover Halloween Candy Cookies are a great way of using up Halloween treats that are leftover. When you are tired of treats, it’s time to make these babies! They are a chewy oatmeal cookie, so it’s a nice break from the usual cookies that are chock full of treats. I think that everyone needs at least one Halloween Candy Leftover Cookie recipe, don’t you?

Happy Baking everyone!



Halloween Leftover Cookies

A fabulous cookie using all your leftover Halloween treats!
5 from 2 votes
Prep Time
5 minutes
Cook Time
8 minutes
Total Time
13 minutes
Karlynn Johnston


  • 1 cup butter
  • 1 1/4 cup brown sugar
  • 1/2 cup white sugar
  • 2 eggs
  • 1 1/2 teaspoons vanilla extract
  • 1 3/4 cup white flour
  • 1 teaspoon baking soda
  • 2 1/2 cups large flake oats
  • 2 cups Smarties M & M’s or chopped up chocolate bars, etc


  • Kick the tires and light the fires to 350 degrees.
  • In a mixing bowl, cream together your butter and sugars.
  • Once those are light and fluffy, beat in the eggs and vanilla, again until it’s light, airy and completely combined. 
  • Take the flour and mix the baking soda in, then add to the bowl. 
  • Mix on low speed until the dry ingredients are blended in.
  • Add in the oats, mixing until they are through the dough.
  • Take your Halloween candies and mix them in by hand. 
  • Line your cookie sheets with parchment paper. 
  • Take a golf ball sized scoop and roll into a ball. Then flatten them either between your palms or on the cookie sheets. Fit six to a sheet. Or, if you choose to do larger ones, space accordingly. You must flatten them to achieve the flat yet chewy goodness you see in the photo. 
  • Bake in the 350 degree oven for 7-8 minutes, watch them carefully, then pull them out when they look browned. They might be a little “soft in the middle” good! Cool them on the sheets completely.

Nutrition Information

Calories: 272kcal, Carbohydrates: 36g, Protein: 3g, Fat: 13g, Saturated Fat: 8g, Cholesterol: 33mg, Sodium: 131mg, Potassium: 105mg, Fiber: 1g, Sugar: 22g, Vitamin A: 255IU, Calcium: 23mg, Iron: 1.3mg

All calories and info are based on a third party calculator and are only an estimate. Actual nutritional info will vary with brands used, your measuring methods, portion sizes and more.

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stack of Leftover Cookies in a blue plate with smarties M&M

Karlynn Johnston

I’m a busy mom of two, wife & cookbook author who loves creating fast, fresh meals for my little family on the Canadian prairies. Karlynn Facts: I'm allergic to broccoli. I've never met a cocktail that I didn't like. I would rather burn down my house than clean it. Most of all, I love helping YOU get dinner ready because there's nothing more important than connecting with our loved ones around the dinner table!

Learn more about me

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