Name: Graveyard Brownies (Easy Halloween Treat!)
Prep time: 15 min
Cook time: 28 min
Total time: 43 min
Ingredients: ½ cup (10 tablespoons) / (142 g) unsalted butter, melted; 1 cup (200g) granulated sugar; ¼ cup (50g) light brown sugar, packed; 1 large egg (room temperature); 1½ teaspoons pure vanilla extract; ⅔ cup (75g) all-purpose flour; ½ cup (50g) unsweetened cocoa powder, sifted; ½ teaspoon Diamond Crystal kosher salt, for table salt, ( (or ¼ teaspoon table salt)); 3.5 oz (100g) chocolate chips, (optional, but highly recommended); 4 tablespoons (57g) ½ stick unsalted butter, softened; 1 cup (120g) powdered sugar; 3 tablespoons unsweetened cocoa powder; 1 teaspoon vanilla extract; 5 tablespoons milk or heavy cream (or as needed); Pinch of salt; 8-10 chocolate sandwich cookies (like Oreos, crushed); 6-8 Milano cookies; 1-2 tablespoons black writing icing or melted chocolate; 6-8 candy pumpkins; 4-5 gummy worms, (cut in half); Candy eyeballs or Halloween sprinkles, (optional)

These easy Halloween brownies turn one pan of fudgy brownies into a graveyard scene with Milano cookie tombstones, crushed Oreo dirt, and whatever candy is rattling around your pantry. No special pans, no cake-decorating skills, and the same shiny, crackly top as a bakery brownie.

A close-up of Halloween-themed brownies topped with cookie "tombstones" labeled "RIP," candy pumpkins, gummy worms, and candy corn, arranged on a marble surface.

Save this Recipe!

We'll email this post to you, so you can come back to it later!

Graveyard Brownies (Easy Halloween Treat for Kids & Parties!)

If decorated desserts usually stress you out, this one is intentionally forgiving. I broke a few on my first batch by pushing the Milanos in too far; about one-third of the way in is the sweet spot, and my son handled the rest of the decorating himself.

If you want Halloween treats that skip the oven entirely, try my Halloween pretzel rods (ready in 15 minutes), or my Halloween Rice Krispie treats with four spooky designs. Both are perfect for kids to decorate!

Why you’ll love this recipe

One-bowl scratch brownies – Melted butter, a whisk, and one bowl. Barely more work than a box mix, with way better flavor and that shiny, crackly top.
Box mix works too! Short on time? Use your favorite brownie mix for the base; the decorations are what make these special.
Make-ahead friendly: Bake the brownies up to 3 days ahead and decorate whenever you’re ready.
Customizable decorations: Use whatever Halloween candy you have on hand or love.

Ingredients you’ll need

Top-down view of labeled baking ingredients in glass bowls on a marble surface: butter, cocoa powder, flour, chocolate chips, brown sugar, granulated sugar, vanilla, eggs, and a small dish of salt.

For the brownies:

Melted butter (not softened) creates that fudgy texture and helps achieve the signature crackly top.
Brown sugar adds moisture and a subtle caramel flavor, making these brownies extra fudgy.
Room temperature eggs incorporate more smoothly and create a better texture.
Sifted cocoa powder prevents lumps and gives you a smoother batter.
Chocolate chips (optional but highly recommended) – those melty chocolate pockets take these from “delicious brownies” to “the best brownies I’ve ever had.”

For the decorations:

Milano cookies are my go-to for tombstones because they’re sturdy, the right shape, and easy to find. Not a Milano fan? Nutter Butter cookies, Vienna Fingers, or cut graham crackers into tombstone shapes.
Black writing icing is the easiest option for the tombstone lettering. Grab a tube from the baking aisle.

See recipe card below for a full list of ingredients and measurements.

Substitutions and variations

Using a box mix:

Short on time? Absolutely, use a box brownie mix! Follow the package directions for an 8×8-inch pan. The Ghirardelli brand brownies are my favorite!
Pro tip: For fudgier box mix brownies that hold tombstones better, slightly underbake them by 2-3 minutes.

No Milano cookies? Use Nutter Butters (already tombstone-shaped!), Vienna Fingers, vanilla wafers, or cut graham crackers into tombstone shapes.
Gingersnap tombstones – Use gingersnap cookies for a spiced twist.

This recipe has not been tested with other substitutions or variations. If you replace or add any ingredients, please let us know how it turned out in the comments below!

Step-by-step instructions

Note: These instructions are for the from-scratch brownies included in the recipe card. If you’re using a box mix, follow the package directions for an 8×8-inch pan, let them cool completely, then skip to Step 6 to make the frosting and decorate!

A clear glass bowl filled with a smooth, light yellow mixture sits on a white, lightly speckled countertop.

In a medium saucepan or microwave-safe bowl, melt butter until fully liquid but not sizzling. Whisk in granulated sugar and brown sugar until glossy and thick.

A metal whisk rests in a glass bowl filled with a smooth, yellow batter mixture, set on a light countertop.

Whisk in the egg, then vanilla extract. Whisk vigorously for 30–45 seconds until the mixture looks smooth and slightly lighter in color.

A glass bowl filled with thick chocolate batter being mixed with a white spatula, placed on a light marble surface.

In a separate bowl, whisk together flour, sifted cocoa powder, and salt. Gently fold into the wet mixture until just combined. No streaks of flour should remain, but don’t overmix.

A glass bowl filled with thick, glossy chocolate brownie batter being mixed with a white spatula on a light-colored surface.

Fold in chocolate chips.

A freshly baked pan of brownies with a shiny, cracked top, still in a parchment-lined square baking dish.

Spread batter evenly in prepared pan. Bake 28-32 minutes, until edges are set and a toothpick inserted 2 inches from the edge comes out with moist crumbs (not wet batter). The center should look slightly soft and glossy, it will set as it cools. Cool completely in pan for at least 1 hour before frosting.

A glass bowl filled with thick, creamy chocolate batter being mixed with an electric hand mixer, partially visible in the foreground. The batter is spread along the sides of the bowl.

Make the frosting: Beat softened butter until creamy (about 30 seconds). Add powdered sugar, cocoa powder, vanilla, and salt; mix on low until combined. Add milk or heavy cream 1 tablespoon at a time until smooth and spreadable (about 5 tablespoons total).

A hand with pink nails holds a cookie while chocolate icing is being piped onto it in the shape of the letter "RIP".

Using black writing icing, write “RIP,” “BOO,” “EEK,” or spooky messages on Milano cookies.

A close-up of hands spreading chocolate frosting evenly over a square cake in a parchment-lined baking pan using an offset spatula.

Spread a thin layer of chocolate frosting over the cooled brownies. Pull up on the parchment paper and transfer the brownies to a flat surface. Cut the brownies into rectangles (I cut mine 4 x 3 to make 12 rectangular brownies).

A clear plastic Ziploc bag filled with finely crushed chocolate sandwich cookies, resembling dark cookie “dirt,” on a light-colored marble surface.

Crush chocolate sandwich cookies (like Oreos) into fine crumbs (food processor or zip-top bag with rolling pin).

A hand places a cookie decorated with "RIP" in black icing onto a rectangular chocolate frosted brownie, resembling a tombstone in a grave.

Press Milano tombstones into brownies about one-third of the way down so they stand upright.

A hand uses a spoon to sprinkle crushed chocolate cookies onto a chocolate cake decorated with a cookie shaped like a tombstone, iced with the letters “RIP.”

Sprinkle Oreo crumbs evenly over frosting, pressing gently so they stick.

A Halloween-themed brownie decorated to look like a grave, topped with crushed cookies, a cookie tombstone with "RIP" written in chocolate, a gummy worm, candy pumpkin, and candy eyes.

Arrange candy pumpkins, gummy worms (cut in half so they look like they’re crawling out), candy eyeballs, and any other Halloween decorations around the tombstones.

Expert tips

Don’t overbake the brownies. The center should still look slightly soft and glossy when you pull them out. They’ll continue to set as they cool, giving you that perfect fudgy texture.
Let the brownies cool completely before frosting. Warm brownies = melted frosting and decorations that slide right off. Give them at least an hour.
Use the parchment overhang. Lining your pan with parchment and leaving some hanging over the edges makes it easy to lift the whole brownie slab out for clean cutting.
Work quickly when decorating. Once you add the frosting, insert the tombstones right away while everything is still sticky.
Don’t bury the tombstones. Pushing the Milanos in too far is how I cracked my first batch of brownies. One-third of the way in is enough for them to stand, and a dab of frosting on the bottom of the cookie handles any wobblers.

Recipe FAQs

Make sure the brownies are completely cool and fudgy (not overbaked). Press each Milano cookie about one-third of the way into the brownie. If they won’t stay, add a small dab of frosting to the bottom of the cookie as “glue.”

Bake the brownies up to 3 days ahead and store them wrapped at room temperature. Make the frosting up to 2 days ahead (refrigerate it, then bring it to room temperature before using). Decorate 1–2 days before serving.

The secret is in the sugar! Whisk the granulated and brown sugar into the warm, melted butter until the mixture is glossy and thick. That dissolves the sugar, and dissolved sugar rises to the surface with the egg as the brownies bake, drying into that thin, shiny, crackly layer.

A child decorates a brownie graveyard with cookie tombstones, colorful candies, and icing on a baking sheet, surrounded by baking ingredients on a kitchen counter.

My son had fun decorating my test batches!

Storage

Room Temperature and Refrigerator

Undecorated brownies: Store in an airtight container at room temperature for up to 3 days, or refrigerate for up to 1 week.

Decorated brownies: Store in an airtight container at room temperature for 2–3 days. The Milano cookies will soften over time, so these are best enjoyed fresh. Avoid refrigerating decorated brownies as the cookies will get too soft.

Freezing instructions

I recommend freezing the undecorated brownies wrapped tightly in plastic wrap and foil for up to 3 months. Thaw overnight in the refrigerator before decorating.