These Halloween brownies are a one-pot chocolate batch made in a 9×13 inch pan, then cut into squares and decorated with candy corn, mini marshmallows and black and orange sprinkles. The butter is melted in a saucepan, so there is no mixer to pull out. The recipe makes 12 brownies and takes about 50 minutes in total, with 20 minutes of prep and 30 of baking.
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The decorating is the fun part. You can build spooky faces and patterns on each square, and it is an easy job to hand to kids.
What Goes in the Batter
Amounts are in the recipe card at the bottom. This is what each ingredient does.
- Unsalted butter: melted first. It makes the brownies rich, moist and fudgy.
- Granulated sugar: stirred into the warm butter until well combined, which creates the base of the batter.
- Eggs: added one at a time. They give structure and a chewy texture.
- Vanilla extract: adds a warm, aromatic note.
- All-purpose flour and unsweetened cocoa powder: the flour gives the texture and the cocoa gives the chocolate flavor.
- Baking powder and salt: the baking powder helps the brownies rise, and the salt balances the sweetness.
- Chocolate chips: folded in at the end for extra chocolate.
- Candy corn, mini marshmallows and sprinkles: the decoration, added once the brownies have cooled.
Making the Batter
Gather and measure everything first. A kitchen scale helps with the flour and cocoa powder if you want precise amounts.
Melt the butter in a medium saucepan over low heat. A heavy-bottomed pan helps keep it from burning. Take it off the heat and stir in the sugar, then add the eggs one at a time, mixing well after each, and stir in the vanilla.
Whisk the flour, cocoa powder, baking powder and salt together in a separate bowl. Add the dry mixture gradually to the wet one and stir until just combined, then fold in the chocolate chips. Spread the batter evenly in the pan, which should be greased or lined with parchment paper so the brownies lift out easily.
Baking and Cooling
Bake at 350°F (175°C) for 25 to 30 minutes. A toothpick pushed into the center should come out with a few moist crumbs. Start checking about 5 minutes before the time is up, because pulling them at the first sign of moist crumbs keeps them fudgy.
Let the brownies cool in the pan for about 10 minutes, then move them to a wire rack to cool completely. Cutting them once they are fully cool gives cleaner edges. Then cut into squares and decorate.
Decorating Ideas
Candy corn and mini marshmallows make good spooky faces, and colored sprinkles can match whatever theme you have in mind. Chocolate-covered pretzels, gummy worms and edible eyes also work if candy corn is not your thing.

Changing the Recipe
- Brown sugar: replace half of the granulated sugar with brown sugar for a richer flavor.
- Peppermint: add a teaspoon of peppermint extract to the batter for a minty twist.
- Peanut butter: swirl some creamy peanut butter into the batter before baking.
- Gluten-free: swap the all-purpose flour for a gluten-free flour blend.
What to Serve With Them
A dollop of homemade whipped cream balances the richness of the brownies, and you can sweeten it to taste. A scoop of vanilla ice cream gives a cold contrast to the fudgy squares. For drinks, a warm pumpkin spice latte or hot apple cider fits the season, and a sugar-free cider is an option.
Nutrition per Brownie
One brownie has approximately 250 calories, 12 grams of fat, 30 grams of carbohydrates, 30 grams of sugar and 3 grams of protein.
FAQ
Can I make the brownies ahead of time?
Yes. You can make the batter a day ahead and keep it in the refrigerator, then bring it to room temperature before baking. You can also bake the brownies first and store them in an airtight container until you are ready to decorate.
How should leftover brownies be stored?
Keep them in an airtight container at room temperature for up to 3 days. They can be refrigerated for up to a week, or frozen for up to 3 months. Wrap them tightly in plastic wrap before freezing.
What can you use instead of candy corn?
Chocolate-covered pretzels, gummy worms or edible eyes all make good spooky decorations.
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Written and edited by The Foodie Yummy Kitchen Team
The Foodie Yummy Kitchen Team writes and edits the recipes on Foodie Yummy: classic American potluck salads, holiday sides and easy comfort food, with a few low-carb options. Every recipe lists exact quantities, numbered steps and a printable recipe card, plus notes on swaps, storage and make-ahead timing. Spot a problem with a recipe? Tell us through the contact page and we will correct it. About us
Spooky Halloween Brownies: Create Deliciously Creepy Treats!
Ingredients
Instructions
Preheat your oven to 350°F (175°C). Grease a 9×13 inch baking pan or line it with parchment paper for easy removal.
In a medium saucepan, melt the butter over low heat. Remove from heat and stir in the sugar until well combined.
Add the eggs one at a time, mixing well after each addition. Stir in the vanilla extract.
In a separate bowl, whisk together the flour, cocoa powder, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, stirring until just combined. Fold in the chocolate chips.
Pour the brownie batter into the prepared baking pan and spread it evenly.
Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
Allow the brownies to cool in the pan for about 10 minutes before transferring them to a wire rack to cool completely.
Once cooled, cut the brownies into squares and decorate with candy corn, mini marshmallows, and sprinkles to create spooky faces or designs.
Notes
For a richer flavor, substitute half of the granulated sugar with brown sugar.
Add a teaspoon of peppermint extract for a minty twist, or swirl in some peanut butter for added flavor.
Nutrition
| Serving Size | 1 brownie |
|---|---|
| Calories | 250 calories |
| Sugar Content | 30g |
| Sodium Content | Not specified |
| Fat Content | 12g |
| Saturated Fat Content | Not specified |
| Unsaturated Fat Content | Not specified |
| Trans Fat Content | Not specified |
| Carbohydrate Content | 30g |
| Fiber Content | Not specified |
| Protein Content | 3g |
| Cholesterol Content | Not specified |
