21 Birthday Cake Idea

Last Updated on December 19, 2022 by Amanda P. Brown

After the 18th birthday, the 21st birthday is also another important day for a person. If your 21st birthday is near, then this article will surely make your birthday more remarkable. Again, turning into 21 age is precious to celebrate your birthday with your family and beloved friends. In the Netherlands, the 21st birthday is known as a “crown year” of a person.

However, when planning your birthday party, it’s essential to think about what kind of cake you will cut on this special day. So, to make your birthday party more pleasant and impressive, I have given here the 4-best 21 Birthday Cake idea that you can follow.

21 Birthday Cake Idea with Recipes

This article will share some 21st Birthday cakeideas that will add more enjoyment and happiness to anyone’s 21 birthday. They are-

21st Birthday Cake for Men

  1. Beer Mug Cake
  2. Football Birthday Cake

21st Birthday Cakes for Girls

3. Vegan Chocolate Cake (Double-layer

4. Rose Gold Drip Cake

1.  Beer Mug Cake

Beer Mug Cake

Beer mug cake is usually made with buttercream topping, and it is best suited for a boy’s 21st birthday celebration. However, in my opinion, this cake is one of the best birthday cakes for men. Besides, if you are a beer lover, whether you are a boy or girl, you will definitely like to cut this cake on your birthday. 


For Buttercream Frosting

  • Vanilla Extract: 1-teaspoon 
  • Heavy Whipping Cream: 6-tablespoons 
  • Softened Butter: 1 ½-cups 
  • Salt: 1/8 -teaspoon 
  • Almond or Lemon Extract: ½-teaspoon 
  • Powdered Sugar: 6-cups

For Yellow Cake

  • Unsalted Soft: 1-cup 
  • Buttermilk (Use Room Temperature): ¾-cup
  • Granulated Sugar: 1 ½-cups 
  • Vanilla Extract: 1-tablespoon 
  • Egg Yolks: 8-large 
  • Baking Powder: 2-teaspoon 
  • Lemon Zest: 2-teaspoons 
  • Salt: ¾-teaspoon 
  • Cake Flour: 2-cups 

For Decoration

  • Modeling Chocolate or White Fondant (3-4 Oz)
  • Yellow or Gold Fool Coloring

Baking Process

  • Prepare the non-stick pan with flour and butter inside, make a 9 × 13-inch line on the pan. Set the oven to 350°F. 
  • Mix the baking powder and flour in a separate pot and set it aside.
  • Using an electric mixer, blend the sugar and butter. Beat it until it becomes fluffy. Add egg yolk with it and beat it again for about 30 seconds. 
  • Add lemon zest, salt, and vanilla extract. Slowly add 1-cup of flour and mix it. Now add half buttermilk, combine and make it smooth. After that, add the remaining flour and buttermilk. 
  • After prepared the batter, set the batter in the pan. Bake for half an hour, or until a toothpick entered in the cake inner comes out dry. 
  • Cool the cake for about 12 minutes in the pan. Now change the cake onto a square cake board. Let the cake cool completely for a minimum of 1 hour.
  • Carve some bottom edge of the cake (as a beer mug). Make several curves opposite the cake (like foam on the top of a beer mug).

Making Process of Buttercream Frosting

  • Mix the butter and powdered sugar in a big bowl and beat until fluffy. Add half heavy whipped cream and vanilla extract, continue beat. 
  • Then add the remaining heavy whipped cream. Make a nice frosting spreadable texture.
  • Turn 3-cups of frosting into yellow golden color. Pipe the frosting on the cake top (2-inch border). Add remaining frosting to spread on the top of the cake.
  • To make a beer mug handle, color model chocolate and white fondant using a small drop of yellow or gold fondant.
  • Make a roll shape of it and join it to the cake’s side. Enjoy it on your birthday.

Nutrition Facts (Per Serving)

  • Cholesterol-63mg
  • Total Fat-24 g
  • Protein-3g
  • Carbohydrates-84 g
  • Calories-557

2.  Football Birthday Cake

Football Birthday Cake

Are you a football lover? If your answer is yes, this most attractive football cake will make your 21st birthday more cheerful. Especially if you arrange a football theme birthday party, it will be best suited among other 21st birthday cakes.


  • Buttermilk: 1-cup
  • Vanilla Extract: 1-teaspoon
  • Baking Powder: 1-teaspoon
  • All-purpose Flour: 1 ¾-cups
  • Eggs: 2-large
  • Kosher Salt: 1-teaspoon
  • Boiling Water: 1-cup
  • Granulated Sugar: 1 .3/4-cups
  • Vegetable Oil: 1/2-cup
  • Cocoa Powder (unsweetened): ¾-cup
  • Baking Soda: 1/2-teaspoon

For the Buttercream

  • Cocoa Powder (unsweetened): 1/2-cup
  • Heavy Cream: 1/4-cup
  • Softened Butter: 1-cup
  • Vanilla Extract: 2-teaspoon
  • Sugar(powdered): 3 -cups
  • Kosher Salt: 1/4-teaspoon

Baking Process

  • Begin by preheating the oven to 350 degrees F. Make a 9-inch line in a round cake pan and grease your cake pans with cooking spray.
  • Use a large bowl to mix baking flour, salt, sugar, soda, baking powder, and cocoa powder. In another one, mix buttermilk, vanilla, oil, and eggs. Combine it well. After that, add 1 cup of boiling water.
  • Place the batter in the cake pan. Bake it for about 37 to 40 minutes or till your inserted toothpick comes dry from the middle of the cake. Then your cake is made. Allow it to cool for 12 minutes. After that, place the cake in a wire rack. Now allow the cake for complete cooling.

Making Buttercream

  • With the help of a hand mixer, beat the butter to make it smooth. In the meantime, add powdered sugar and beat it well. 
  • Add salt, heavy cream, and vanilla. Beat it one more time to combine. Also, keep 1 cup buttercream aside. Then add cocoa powder into the existing buttercream. Beat again.
  • Now, using a serrated knife, cut down the center of the cake. Cut the 3/4 inch away from the sides of the cake. Dispel the center side of the cake. 
  • Apply chocolate buttercream frosting on the cut sides of the cake. Attach it. Apply chocolate frosting outside of the cake. With the help of a piping bag, make pipe laces and lines over the cake. Have fun.

Nutrition Facts

  • Protein-5.34g 
  • Total Fat-20.81g 
  • Total Carbohydrates-40.25g 
  • Total Calories-364.17

3. Vegan Chocolate Cake (Double-layer)

Vegan Chocolate Cake

Usually, girls love to eat chocolate. So, to make your girl feel special, it will be best to bake the 21st birthday cake with chocolate. Therefore, this cake can be your ultimate 21 Birthday Cake Idea that everybody will love for sure.


  • Water: 1 -cup
  • Cocoa Powder: 3/4-cup
  • Applesauce, Yogurt, or Banana of Choice: 1/2-cup
  • White Flour: 2-cups 
  • Salt:1-teaspoon
  • Pure Vanilla Extract: 1. ½-tablespoon
  • Sugar: 1. ½-cup
  • Baking Soda: 1-teaspoon
  • Mini Chocolate Chips: 1-cup
  • Oil / Almond Butter: ½-cup

Baking Process

  • Start with preheating the oven at 350 degrees F. Use two round pans or 8 inches pan, grease it. 
  • Mix the ingredients cocoa powder, chocolate chips, baking soda, sweetener, flour, and salt in a bowl. Use another bowl to whisk yogurt or apple sauce, vanilla, water, and softened nut butter or oil.
  • Mix it until combined. Put the batter into the pans. Bake it on the rack in the preheated oven for about 22-25 minutes or till an inserted toothpick comes dry from the center. If you have much time, then I suggest resting it in the refrigerator for the next day. 
  • After that, remove each cake from the pan to a large plate. Frost the cake particularly. 
  • Now attach one cake on top of the other. You can also frost the cake’s sides if you prefer. 

Nutrition Facts

  • Total Calories-243
  • Protein-3.8g 
  • Cholesterol-0 mg
  • Total Fat-10.5 g
  • Total Carbohydrates-38.8g   

4. Rose Gold Drip Cake

Rose Gold Drip Cake

It is the fanciest and perfect cake among 21st birthday cake ideas.  The decoration of this cake will attract everybody for sure. On your 21st birthday, the taste of this cake will stun everyone. But, again, it is an ideal cake for other occasions as well, such as weddings, marriage day, and so on. 


For Making Rose Cake Batter

  • Buttermilk (Room Temperature): 1- cup 
  • Salt: 1- teaspoon
  • Unsalted Butter (Room Temperature): 1- cup
  • Vanilla Extract: 3- teaspoon
  • Vegetable Oil: 1/8- cups
  • Flour: 3. ¼- cups
  • Baking Powder: 2. ½- teaspoon
  • Granulated Sugar: 3- cups
  • Egg Whites: 7-piece (minimum)
  • Rose: 1/2- cup

For Pink Colorful Drips (White Chocolate Ganache)

  • Wooden Dowels
  • Plastic Squirt Bottles
  • Heavy Cream: 0.5-cup
  • Paintbrush (for Apply Gold Leaf)
  • Edible Gold Leaf (1 Full Booklet)
  • Gel Food Coloring (Optional)

For the Vanilla Buttercream Frosting

  • Heavy Cream: 2 -tablespoon
  • Unsalted Butter (Room Temperature): 2- cups
  • Powdered Sugar: 8- cups
  • Vanilla Extract: 3- teaspoon
  • Salt: 1/2- tablespoon
  • White Chocolate Chips: 1.5-cups

Baking Process

  • Make a line in 4-round pans (4 inches) and 4-round pans (6 inches) and grease them. Set the oven to 350 degrees F. 
  • Mix the ingredients salt, baking powder, flour, and sugar using a stand mixer paddle. 
  • Using a low speed, whisk chunks of butter into the dry mixture. Mix it well until there are no more chunks of butter remain. Put the egg whites and continue to mix. Add buttermilk and mix it for a moment. 
  • Then add oil, rose, and vanilla. Combine it until the mixture becomes smooth. Use a spatula to scrape the bowl’s side.
  • Beat the mixture for about 30 seconds. Divide the mixture and replace the mixture with the prepared cake pans. 
  • Then bake it in an oven, set at 350 degrees for about 32 to 35 minutes, or ​​until a toothpick inserted in the cake’s inner comes out dry. 
  • Rest it for cool about 10 or 12 minutes. By using an offset spatula, detach the cake from the cake pan. Put the cake layers on a rack to cool.

To Make Ganache

  • After finishing the baking process of cake layers, make the white chocolate ganache. 
  • Now, use a heat-proof bowl to heat the heavy cream. It takes 45 seconds or 1 minute. When the buttercream starts bubbling, then add white chocolate chips into it. Rest the mixture for 2 minutes. 
  • Heat again until the heavy cream and chocolate chips become melted or combined. Repeat the process if it is necessary. Separate the mixture into two bowls. Add food coloring. 
  • Make one bowl a light pink color and another hot pink color. Rest the ganache for about 40 to 45 minutes. 
  • Pour the batter into squirt bottles or use a spoon to make drips for the cake.  

To Make Buttercream Frosting

  • To prepare the frosting, beat the buttercream for about 30 seconds until the buttercream becomes smooth. In the meantime, add 1 cup powdered sugar, combine it well. 
  • After that, add salt and vanilla extract. Beat it slowly. (This is the frosting for a cake, so this frosting should be super smooth. If your frosting becomes too thin, then add more powdered sugar or if your frosting becomes too thick, then add a teaspoon of cream at a time).


  • Don’t forget about decorating the top of your beautiful cake! Use a serrated knife and level the cake. Stack and make 6-inch frost cake layers. Then shed a thin crumb coat and put it in the refrigerator for 6 minutes. 
  • After that, again apply thick frosting. After the smooth frosting, gently cover the cake with an edible gold leaf. Again set the cake in the freezer for another 5 minutes. Repeat the same process to make 4-inch cake layers. Finally, put them on 4-inch diameter cardboard. 
  • Now, with the help of a squirt bottle, pour ganache drips on the cake. You can add ganache drips as per your desire.
  • You should cut the 4-wooden dowels with a measurement that their height remains the same as the bottom tier of cakes. Then, make the bottom tier into a square and make sure it’s big enough to hold the top tier.
  • Carefully set the small tier on the top of the 6-inch tiers. Then it’s time to enjoy it.

Birthday Cakes for a 21-year Old Female

There are some exciting cakes for 21st-year old females. These are –

  • Strawberry Basket cake
  • Berry Ice Cream cake
  • Strawberry Angel Food Layer cake
  • Cookies and Ice Cream cake
  • Melted Chocolate cake

Elegant 21st Birthday Cakes

If you are looking for some elegant cake ideas which will be more suitable for 21st birthday, I have some cake ideas for you which are given below-

  • Pink Velvet cake
  • Naked cake
  • Marble cake
  • Basket cake
  • Ruffle cake

21st Birthday Cakes for Guys

There are some best birthday cakes for guys that you can enjoy yourself better on your 21st birthday. These are-

  • Ice Beer Bucket cake
  • Peaky Blinders cake
  • Beer Barrel cake
  • Game of Thrones cake
  • Liverpool FC cake

Funny 21st Birthday Cakes for Guys

Chilling out with a cake at a birthday party is a common thing for guys. So here are some Funny 21st birthday cakes for guys. These are-

  • Tier cake
  • Play Station cake
  • Messy Bedroom cake
  • Football Jersey cake
  • Drum cake

What Do You Write on a 21st Birthday Cake? 

Writing on a birthday cake is a funny thing. Here are some better lines that you can write on someone’s 21st birthday cake. Such as-
·         Cheers to 21 Years!
·         Here comes the star of freedom!
·         21 Today and Ready to Party!
·         Congratulations on entering adulthood!
·         Secure Your Teeth Before You Blow

What is Some Cost-Effective Party Planning for a 21st Birthday?

Do only what you need to celebrate the birthday according to your budget. If some are left, then add others. You can select compatible things with your smart planning and management even at a cheap rate.
·       Find the proper location.
·       Bake your cake and arrange the candles
·       Chill on decorations
·       Creative, funny party game
·       Unique experimental gifts

What is Served at a 21st Birthday Celebration?

A cake is absolutely a great attraction for starting your party, but add other foods that can enrich your part menu are:
·       With ranch dressing, cheese sticks, as a side partner, marinara sauce
·       Spinach and Potato skins with skins dip with salsa
·       Chicken fingers, lollipop
·       Vegetable patties, Kathi roll, and cutlet.

Is Age 21 a Milestone Birthday?

21 age is a special birthday for one as he/she, after this age considered a complete adult. However, many countries consider 18 age as an adult but in some countries still 21. Many give some adult rights to 18 aged but maintain some restrictions. These restrictions, they remove after 21.

What Games Can You Play at a 21st Birthday Party?

At the 21st birthday party, the games you can play are:
·       Flip cup
·       Boxing
·       Never have I ever
·       21 games with a choice able drink
·       Pictionary
·       Most likely
·       King’s cup
·       Pass the parcel
·       Birthday Trivia
·       Truth-dare
·       Speechless- tight-Lipped guessing
·       Rage cage
·       Water or untasted drink
·       Straight face
·       Civil war
·       Scavenger hunt

What is Traditionally Given on the 21st Birthday?

21st birthday is the first door to getting consideration as an adult. From this age, your family and society start to trust you to hold responsibilities. Even they consider you enough to maintain your house key. That’s why traditionally, the family gives a key pendant as a senior symbolic member on the 21st birthday.

Final Verdict

The birthday becomes more special when someone gets 21 years old. Mainly, everyone wants to celebrate their 21st birthday with some spark. Therefore, nowadays without cakes, we can’t imagine a birthday party. To make your birthday more pleasant, you can try any of the cake recipes I have shared above. I hope this article regarding the 21 birthday cake idea will inspire you to make a cake for your 21st birthday. Till then, stay happy and healthy. I wish you a happy 21st birthday!

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