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Black Marshmallow Spiderweb Cake

Want a super simple Halloween cake - or an EASY way to Halloween-ify a store-bought cake? The black marshmallow spiderweb is the way to go!
Prep Time5 minutes
Cook Time0 minutes
Decorating time10 minutes
Total Time15 minutes
Course: Dessert
Cuisine: American
Keyword: Black Spiderweb cake, Easy Halloween Desserts, Halloween Cake, Halloween spiderweb cake, Marshmallow spiderweb cake
Servings: 16 servings
Calories: 156kcal
Author: Sarah H

Ingredients

  • 1 Frosted cake (size / color of your choice) - here's my favorite vanilla cake recipe and my favorite frosting recipe if you need ideas!
  • 5 ounces marshmallows Regular or mini marshmallows are both fine. (I melted down an entire 10oz bag and had more than enough mixture for 2 8-inch cakes.)
  • 2-4 Tablespoons black cocoa powder
  • 2-4 large drops Black gel food color (add as desired for color - just be aware the more you add the more 'food color' taste you'll get)

Instructions

  • If not done already, stack cake layers + frost your cake - see this post if you could use any help at this stage! (You can also use this spiderweb mixture on a store-bought cake.)
  • Place cake into the refrigerator for at least 15 minutes - chilled frosting will be less likely to melt when the warm marshmallow touches it.
  • Place marshmallows into a large microwave-safe bowl, and microwave on high in 30-second intervals, stirring in between until melted and smooth. (Be aware they'll probably puff up while they're melting - we almost overflowed the bowl!)
  • Add 2 Tablespoons of black cocoa powder and 2 large drops of black gel color, and stir until well blended and even. If you're happy with the color, perfect! If it still looks too light, add an addition 2 Tablespoons of cocoa powder + 2 drops of gel color until you're happy with the color. (Be aware the marshmallow doesn't have a lot of its own flavor and will pick up the 'food color' flavor fairly quickly. The cocoa powder will help, but taste as you go if you're worried about it getting too strong.)
  • Microwaves vary, so stir well and be careful at this step! Our mixture didn't have to cool long, but it was uncomfortable to touch for about 5 minutes after we'd finished mixing. Allow to cool until touch-able.
  • Remove cake from the fridge, and scoop some of the marshmallow mixture from the bowl. Spread and stretch the mixture until it's thin and spider-web-like, and stretch the web over the cake. Repeat this process until the web covers the entire cake!

Video

Notes

Please note nutrition information just includes the marshmallow 'web,' as nutrition information will vary massively with size / type of cake decorated. Counts will also be lower in all fields if not all of the mixture is used. 

Nutrition

Serving: 1serving | Calories: 156kcal | Carbohydrates: 38g | Protein: 4g | Fat: 5g