Monster Cake | From

Monster Cake

Course: Dessert
Cuisine: American
Keyword: Halloween
Dessert Type: Cake
Prep Time: 2 hours
Cook Time: 50 minutes
Total Time: 2 hours 50 minutes
Servings: 16 servings
Calories: 618kcal
Author: Elizabeth LaBau
This Monster Cake is so good, it's scary! This cute Halloween layer cake has a base covered in sprinkles, and a top layer decorated to look like a mini monster. Perfect for parties and spooky occasions! You can use whatever cookies and candies you have to customize the monster and really go wild.
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For the Chocolate Cake:

  • 6 oz butter at room temperature
  • 4.75 oz granulated sugar (2/3 cup)
  • 5 oz brown sugar (2/3 cup packed)
  • 2 large eggs at room temperature
  • 2 tsp vanilla extract
  • 8 fl oz buttermilk (1 cup) at room temperature
  • 4 fl oz sour cream (1/2 cup) at room temperature
  • 2 tbsp water or coffee
  • 7.8 oz all-purpose flour (1¾ cups)
  • 3 oz unsweetened cocoa powder (1 cup)
  • tsp baking soda
  • ½ tsp salt

For the Frosting:

  • 6 fl oz pasteurized liquid egg whites (3/4 cup, see Note below)
  • 24 oz powdered sugar (6 cups)
  • 1/2 tsp salt
  • 24 oz unsalted butter at room temperature (6 sticks)
  • 2 TBSP vanilla extract
  • Green purple, and orange food coloring, I used Americolor Electric Green, Electric Purple, and Electric Orange gel coloring

To Decorate:

  • 2 cups mixed Halloween sprinkles (12-16 oz depending on sprinkles)
  • 3 Oreo Thins
  • 3 mini M&Ms
  • 4 green fruit chews
  • 2 orange fruit chews
  • Black and white fondant
  • 2 lollipop sticks


To Make the Chocolate Cake:

  • Line a 4-inch cake pan and two 6-inch cake pans with parchment, and spray them with nonstick cooking spray. (If you don't have a 4-inch cake pan, you can use a small cheesecake pan, a jumbo muffin tin, or a third 6-inch cake and just trim it later.) Preheat the oven to 350 F.
  • Add the butter and both sugars to the bowl of a large stand mixer fitted with a paddle attachment. Beat them together on medium-high speed, until light and fluffy, about 5 minutes. Add the eggs one at a time, beating well after each addition. Add the vanilla extract and mix it in.
  • In a separate bowl, whisk together the buttermilk, sour cream, and water (or coffee, if using). In a different bowl, sift together the flour, cocoa powder, baking soda, and salt. With the mixer running on low, add a quarter of the sifted flour mixture. When the flour streaks have almost all disappeared, add a third of the liquid to the mixing bowl. When that’s incorporated, continue to add the drys and wets in an alternating pattern, ending with the dry ingredients.
  • When the dry ingredients are nearly incorporated, stop the mixer. Scrape down the bottom and sides of the bowl with a rubber spatula, and finish mixing the cake by hand. Divide the batter between the three pans, filling each about 2/3 full, and smooth it into an even layer. Bake the cakes for 40-50 minutes, until a toothpick inserted into the center comes out with just a few moist crumbs attached. Cool the cakes completely before using.
  • The cakes can be made several days in advance and kept, well-wrapped and refrigerated or frozen, until ready to use. If you freeze them, make sure they are partially defrosted before use.

To Make the Frosting:

  • Combine the whites, powdered sugar, and salt in the bowl of a large stand mixer fitted with a paddle attachment. Mix everything together on low speed, until the sugar is moistened and no dry patches remain. Turn off the mixer, scrape down the sides and bottom of the bowl with a spatula, then turn the mixer to medium speed. Beat on medium for 5 minutes.
  • After 5 minutes, turn the mixer to medium-low and start adding the softened room temperature butter, 1-2 tablespoons at a time. Once all of the butter is incorporated, add the vanilla extract and mix it in. Stop the mixer and scrape down the bottom and sides once more. Turn the speed to medium and beat the buttercream for 10 minutes. 
  • At the end, you’ll have a frosting with a wonderfully light and creamy texture. It can be used right away, or stored in the refrigerator for up to two weeks, or the freezer for up to two months. If you have chilled the frosting, let it come to room temperature COMPLETELY and then beat it for several minutes to smooth it out and restore its texture before using it.

To Assemble and Decorate:

  • Separate out about a cup and a half of frosting, and color it bright orange. Place it in a piping bag fitted with a large round tip or coupler.
  • Divide the remaining frosting in half, and color one half bright green and one half bright purple. Place each of these colors in piping bags as well.
  • Place the 6-inch cakes on 6-inch cake cardboards. Trim the tops of the cakes so that they're level, and cut each cake in half so you end up with four cake layers total. Place one cake on a turntable, and pipe a thick circle of green frosting along the outside edge. Pipe a thick orange circle inside of the green one, then add a purple ring inside that. Continue to pipe circles of buttercream in the same pattern until you reach the center of the cake.
  • Add a second cake round on top, and repeat the frosting circles. Add a third cake round and repeat once more. Place the last cake round on top, press down gently, and make sure the sides of the cake are straight. Spread a very thin layer of green frosting along the top and sides of the cake to lock in any crumbs. Refrigerate for 45-60 minutes, until the cake is firm.
  • While you wait for the 6-inch cake to set, prepare the 4-inch cake. Place it on a 4-inch cake cardboard and cut the cake in half. Do not cut off the top to make it level—we want that cake dome!
  • Repeat the frosting circles inside the cake, but this time start with purple along the outside edge. Add the top of the cake, and cover it with a thin layer of purple frosting to lock in crumbs. Refrigerate until firm.
  • To decorate the 6-inch cake, remove it from the refrigerator once it is firm. Spread more green frosting on the top and sides of the cake. Use a metal spatula to make it as smooth and even as possible, but don’t worry about getting a perfect finish because it will all be covered by sprinkles. Take a 4-inch round cookie cutter, and center it on top of your cake, embedding it slightly in the top.
  • Place the sprinkles in a bowl, and hold the cake in one hand, over a rimmed baking sheet. Take a handful of sprinkles in the other hand, and press them gently but firmly against the side of the cake. Let the excess sprinkles fall into the pan, so you can scoop them up and re-use them. Cover the sides of the cake entirely. Cover the top of the but leave the center of the cookie cutter empty. (Leaving the blank space in the middle will make it easier to layer the cakes.)
  • Once the cake is covered with sprinkles, take a dowel and insert it into the center of the cake. Trim the dowel so it’s flush with the top of the cake, then spread a thin layer of frosting over it to adhere the top layer. Carefully set the purple monster cake on top, centering it over the dowel and making sure it’s secure.
  • Fit a grass (multi-opening) tip onto the bag of purple frosting. Pipe long strands of fur all over the monster cake. I like to begin about an inch from the bottom and pull the strands down so it’s like shaggy fur. After you’ve done the bottom layer, go up another inch and add a second layer that overlaps the first. Continue until you’ve covered the entire cake with frosting fur.
  • You can decorate the monster with whatever candies and treats you have available! To make yours look like mine, twist open 3 Oreo thins, and press a mini M&M into the center of each cream-topped cookie.
  • Roll out black fondant, and cut it into a smiling mouth shape. Roll out a thin tube of white fondant, and cut it into small triangles to make teeth. Stick the teeth onto the black mouth with a little dab of water on each tooth.
  • Take 2 green fruit chews, and roll them between your hands to make horn shapes. Press a toothpick into the base of each horn, so they’re easier to secure into the cake. Take 2 more green fruit chews, and flatten them out. Cut them into a foot shape. Take 2 orange fruit chews, and roll them into balls. Skewer them on lollipop sticks, and roll them in orange sparkling sugar.
  • Now assemble! Press the eyes, mouth, and feet onto the front of the monster. Stick the horns securely into the sides of the monster, and insert the lollipop sticks halfway into the top of the head, so the antennae stick out.
  • For the best taste and texture, serve this cake at room temperature. Leftovers can be stored, well-wrapped, in the refrigerator for up to 5-7 days. The candy elements might start to get sticky and unappetizing, so keep an eye on them and remove them if necessary.


This recipe calls for pasteurized egg whites. It is safe to consume egg whites without cooking them, as long as you make sure that the whites you buy are pasteurized. To save time, I buy them in a carton--look for 100% egg whites, not liquid egg substitute. If you cannot find them in a carton, you can buy pasteurized eggs and separate them yourself. You’ll need about 5-6 large eggs to get the ¾ cup called for in the recipe.


Calories: 618kcal | Carbohydrates: 74g | Protein: 5g | Fat: 46g | Saturated Fat: 29g | Cholesterol: 140mg | Sodium: 396mg | Potassium: 178mg | Fiber: 2g | Sugar: 60g | Vitamin A: 1430IU | Vitamin C: 0.1mg | Calcium: 58mg | Iron: 1.6mg