Bloody Broken Glass Cupcakes are frosted cupcakes topped with shards of homemade sugar glass and a simple corn syrup blood sauce. The glass is made on the stovetop, poured onto a sheet pan to cool, and then smashed into dramatic shards. Perfect for a Halloween party.
The Most Fun You Will Have in the Kitchen All Year
This recipe is really about two things: the sugar glass and the blood. The cupcakes themselves can be whatever you like, homemade or store-bought, any flavor, any frosting. Start with 24 prepared frosted cupcakes and focus your energy on the decorations.
The sugar glass is a simple hard candy cooked to the hard crack stage on a candy thermometer, poured onto a sheet pan, and left to cool into a clear, glassy sheet. Once it is completely cool and set, you cover it with a sheet of parchment and hit it with a hammer. It shatters exactly like real glass, and the whole process is deeply satisfying.
One important note: the sugar glass is best the day it is made. It will begin to absorb moisture from the air and lose its clarity and crispness if left out overnight.
Ingredients for Bloody Broken Glass Cupcakes
Here’s what you will need. Exact amounts are listed in the recipe card below.
For the cupcakes:
- 24 prepared frosted cupcakes – Any flavor works here. A dark chocolate cupcake with white frosting makes the blood and glass really stand out visually.
For the sugar glass:
- Water – Combined with the sugar and corn syrup to make the candy base.
- Light corn syrup – Helps prevent the sugar from crystallizing as it cooks, giving you a clear, glassy result.
- Granulated sugar – The base of the glass. Cook it to exactly 300°F for the hard crack stage.
- Cream of tartar – A small amount helps stabilize the sugar as it cooks.
For the blood:
- Light corn syrup – The base of the blood sauce. It has the right viscosity to drizzle and cling to the cupcakes.
- Cornstarch – Slightly thickens the blood sauce for a more realistic consistency.
- Red and blue food coloring – The combination of red with just a drop of blue gives the blood a deep, realistic color rather than a bright candy-red.
How to Make Bloody Broken Glass Cupcakes
Prep: 5 min | Cook: 50 min | Cool: 30 min | Servings: 24
For the sugar glass:
STEP ONE: Cook the candy. In a large saucepan over medium-high heat, whisk together the water, corn syrup, granulated sugar, and cream of tartar. Bring to a boil, stirring continuously, until the mixture reaches 300°F on a candy thermometer. This is the hard-crack stage and is important; do not rush it or pull it off the heat early.
STEP TWO: Pour and cool. Working quickly, pour the hot sugar mixture onto a parchment-lined rimmed baking sheet. Spread it as evenly as possible and allow to cool completely, about 30 minutes.
STEP THREE: Smash. Once completely cool, use the edges of the parchment to lift the glass sheet out of the pan and place it on a smooth surface. Cover with a second sheet of parchment and hit it with a hammer until it shatters into glass-like shards.
For the blood:
STEP FOUR: Make the blood. In a small bowl, whisk together the corn syrup, cornstarch, red food coloring, and blue food coloring until smooth and evenly colored.
To assemble:
STEP FIVE: Decorate. Arrange glass shards on each frosted cupcake, pressing them in at different angles. Drizzle generously with blood sauce and serve.
Frequently Asked Questions
The sugar glass is best made and served the same day. It absorbs moisture from the air quickly and will become sticky and lose its clarity if left out overnight.
Yes. Reaching exactly 300°F is what gives the sugar glass its hard, brittle, glass-like texture. Without a thermometer, it is very difficult to know when the candy has reached the correct stage.
Absolutely. This recipe is really about the glass and the blood. Any frosted cupcake works perfectly as the base.
Yes. It is simply hard candy. The shards are sharp, so use caution when handling and be mindful when serving to young children.
Storage
Assembled cupcakes are best served the day they are decorated. Store any undecorated cupcakes at room temperature. Keep the blood sauce in an airtight container in the refrigerator for up to one week.
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Bloody Broken Glass Cupcakes Recipe
Equipment
Ingredients
- 24 cupcakes frosted
For the glass:
- 2 cups water
- 1 cup light corn syrup
- 3 1/2 cups granulated sugar
- 1/4 teaspoon cream of tartar
For the blood:
- 1/2 cup light corn syrup
- 1 tablespoon cornstarch
- 15 drops red food coloring
- 1 drop blue food coloring
Instructions
For the sugar glass:
- In a large saucepan over medium-high heat, whisk together the water, corn syrup, granulated sugar, and cream of tartar. Bring to a boil, stirring continuously, until the mixture reaches 300°F on a candy thermometer. This is the hard-crack stage and is important; do not rush it or pull it off the heat early.
- Working quickly, pour the hot sugar mixture onto a parchment-lined rimmed baking sheet. Spread it as evenly as possible and allow to cool completely, about 30 minutes.
- Once completely cool, use the edges of the parchment to lift the glass sheet out of the pan and place it on a smooth surface. Cover with a second sheet of parchment and hit it with a hammer until it shatters into glass-like shards.
For the blood:
- In a small bowl, whisk together the corn syrup, cornstarch, red food coloring, and blue food coloring until smooth and evenly colored.
To assemble:
- Arrange glass shards on each frosted cupcake, pressing them in at different angles. Drizzle generously with blood sauce and serve.
Nutrition
This post was updated March 23rd, 2026.
Rebeca Rodriguez
Sounds super easy, now let's see if I could find my parchment paper this time that I need it! 🙂
Rebeca Rodriguez
Sounds super easy, now let's see if I could find my parchment paper this time that I need it! 🙂