Frankenstein Halloween Brownies - "stitched" together with an assortment of candies and cookies perfect for a Halloween party or a fun activity for a class treat! Have fun making your own "Frankenstein's Monster." These homemade brownies are fun treats to help get into the Halloween spirit!

These Halloween Treats are fun treats to make during the Halloween season for a fun family activity and can be easily made with store-bought brownie mix. 

This recipe was inspired by my Pumpkin Patch Brownies, a fun fall activity that uses boxed brownie mix, Oreo crumbs, and candied pumpkins. 

Ingredients in Halloween Brownies

• unsalted butter
• cocoa powder
• all-purpose flour
• granulated sugar
• brown sugar
• large eggs
• vanilla extract
• half & half
• any color cooking icing, I used green
• powdered sugar
• crushed Oreo cookies
• M&M candies
• semisweet chocolate chips
• Halloween sprinkles
• Chocolate coated candies
• White chocolate chips
• Mint chocolate chips
• Chocolate-covered sunflower seeds
• candy eyes
• candy corn
• chopped candy bars

How to make Frankenstein Halloween Brownies

These delicious brownies are like the ones that used to be served for school lunches with a twist! To make these brownies, preheat the oven to 350 degrees Fahrenheit and grease the pan with cooking spray or line a 9x13 baking pan with parchment paper. 

In a small saucepan, melt the cup of unsalted butter in a microwave safe bowl and stir in the cocoa powder.

Remove the saucepan from the heat and allow it to cool.

In a large bowl, blend together the brown sugar and granulated sugar and beat in the eggs until combined.

Stir the melted butter mixture into the sugar mixture and stir in the vanilla extract.

Slowly stir the all-purpose flour into the wet ingredients being careful not to overmix. 

​Pour the brownie batter into the prepared pan and bake in the preheated oven for 25 minutes. Check the center with a toothpick to make sure it comes out clean and allow the brownies to cool completely before frosting.

To make the brownie frosting, melt the ¼ cup of butter in a saucepan and stir in the cocoa powder.

Once the cocoa powder is blended into the butter, add in the half & half. 

Remove the saucepan from the heat and stir in the confectioners's sugar.

Allow the frosting to cool completely and become thick before spreading it over the top of the brownies. 

Once the frosting is completely cool, slice the brownies and make the "stitches" with green icing before decorating the Halloween brownies. 

The frosting is made with half & half giving it a smooth and creamy texture and taste.

Decorating these brownies is green decorating icing, although you can use any color you wish or make your own!

These Frankenstein brownies are "stitched" together and then candies are sectioned off to create a brownie with different flavors and textures!

A 9x13 pan easily makes 9 large brownies. The large pieces make it easy to draw the lines and decorate but they can be made smaller to suit your preference.

Hint: A muffin tin is a great way to keep toppings separated and using spoons helps keep the toppings tidy. 

Variations in Fun Halloween Brownies

These brownies have a more "cake-like" texture, if fudgy brownies are desired, these chewy fudge brownies will work just as great when creating your own Frankenstein's Monster!

You can also use your favorite brownie recipe to make these brownies.

These spooky Halloween brownies are "stitched" together with icing and then candies are sectioned off to create a brownie with different flavors and textures! You can get creative and use any color icing for the stitching and you can even make spider webs! You would like and decorate with any type of candy that you want.  This spooky treat is a fun Halloween activity during the Halloween season because it's a chance to get as creative as you want. 

You can use a boxed brownie mix to make these easy Halloween desserts even easier. 

What's needed to make Frankenstein Halloween Brownies

There is no special equipment needed to make these brownies making it a great recipe to make with kids and for Halloween parties.

A 9x13 pan is needed to make these brownies. Either line the brownie pan with parchment paper or grease the pan with cooking spray for easy removal. 

Mixing bowls that are heat-proof to mix the dry ingredients and wet ingredients together.

A rubber spatula to blend the ingredients together and scrape the bottom of the bowl. 

A muffin pan or several small bowls to divide the topping options when decorating your homemade Halloween Brownies.

A small food processor is ideal for making the crumbled cookies or chopping nuts evenly.

Storing these spooky Halloween Brownies

Store these brownies in an airtight container in the refrigerator for up to 3 days. Allow the brownies to come to room temperature to make them chewy brownies again. 

They should be stored in the refrigerator because of the use of half & half in the frosting.  If you want to store these fun Halloween treats at room temperature, use chocolate frosting that is shelf-stable. 

I do not recommend freezing these brownies because of the chopped candies and cookies that these brownies are decorated with. 

Top Tip

The frosting on these chocolatey brownies should be hardened but slightly sticky to help the topping stick onto the brownies. Gently press the candies and cookies into the top of the brownies to help them stick.

Frequently Asked Questions

How do I make gluten-free Halloween Brownies?

You can either make homemade gluten free brownies for use as the base for the Homemade Halloween Brownies by using a measure for measure gluten free flour in place of the all-purpose flour or by using a gluten free brownie mix.  For the toppings, make sure to use candies and cookies marked with the gluten free label. 

How do I make monster brownies?

To turn these brownies into Monster brownies, make the brownies and frosting as directed and use decorating icing and candy eyes to create the lines for the face. 

MORE HALLOWEEN TREATS

Don’t stop these fun Halloween Brownies! There are more fun recipes to make during the Halloween season. 

These Oreo Halloween Brownies are fun to make for Halloween and use a lot of the same candies as in these brownies. 

For an even easier recipe, this Halloween Popcorn Snack Mix is something that is incredibly easy to put together and great for a movie snack or a school lunch snack. 

Another fun and spooky treat is these Easy Popcorn Balls.  They are made with Halloween M&M's and candy corn.