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Solar System Chocolate Cupcakes

To see how the rest of the Solar System Birthday Party turned out see my post on How-To: Create a Solar System Birthday Party. I’ve included our snacks, decoration ideas, and party favor bags on that post.

I dedicate this post to my sweet birthday boy. He probably never would have guessed in his wildest dreams that mommy would do a blog post about the solar system – his current love. But, here we go…Solar System Birthday Cupcakes.


Logan always likes to ask people what their favorite planet is. Most have never thought about it before and have to think for a bit before answering. I always tell him Earth is my favorite and he always asks why. I love this beautiful planet, especially now that I’m seeing a tiny evidence of the spring we will soon experience.


Though Mars may seem really cool with it’s red color or Jupiter’s size may amaze (Logan tells me that 1,300 Earths can fit inside Jupiter), I think I’ll always be partial to Earth. Even with all the bad, annoying, crappy, unfair, and down right stupid things that happen here, there are so many positive things and people and beauty to make up for it if you keep your eyes open.

Happy 5th birthday, Logan! I’m so glad you are here on Earth with me. I love your cuddles and hugs and the way you say “Mom?…I love you.” I can’t believe you are growing up so fast and already don’t like me to kiss you nearly as much as I want to. I hope you enjoy your Solar System birthday party and it’s just as perfect as you could ever imagine.

p.s. I’m sorry I didn’t include Pluto. I know that you know that Pluto is now a dwarf planet (as you would say – got fired), but I think you would have liked it anyway. I just couldn’t find any good pictures on NASA’s website. Probably because Pluto is about 2.7 billion miles from Earth, but you probably already know that too.

p.p.s. Do you think they have chocolate cupcakes on Saturn? These are downright delicious, so I don’t think I could live on a planet that doesn’t have them.


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Solar System Birthday Party Cupcakes

Chocolate Buttermilk Cupcakes with Vanilla Almond Frosting

Dark chocolate cupcakes made with buttermilk and topped with a tasty vanilla almond frosting!


For the Cupcakes:

  • 1/2 cup semi-sweet chocolate
  • 1 cup all-purpose flour
  • 1 1/2 cups cake flour
  • 1 1/2 cup unsweetened cocoa powder
  • 2 tsp baking soda
  • 1 tsp baking powder
  • 3/4 tsp salt
  • 3 large eggs
  • 1 1/2 cups sugar
  • 3/4 cup butter, softened
  • 2 1/2 cups buttermilk
  • 1 vanilla bean, seeds only

For the Buttercream:

  • 1/2 cup (1 stick) butter, room temperature
  • 3-3 1/2 cups confectioners’ sugar
  • 2 tablespoons milk
  • 1/2 vanilla bean (seeds only)
  • 1/2 teaspoon vanilla extract
  • 1/8 teaspoon almond extract
  • food coloring (optional)


For the Cupcakes:

  1. Preheat oven to 350F. Line muffin tins with cupcake cups or grease using nonstick cooking spray.
  2. Melt the chocolate in the microwave, in 15 second intervals, making sure to stir in between. Set aside to cool down for a bit. Sift together flour, cocoa powder, baking soda, baking powder and salt. Set aside.
  3. In a large bowl, beat the eggs and sugar for 5 minutes, until it is pale and thick. Add in the butter. Mix until combined.
  4. Add in the melted chocolate. Now, add in the buttermilk and vanilla. Beat until well incorporated.
  5. Add the flour mixture in 3 increments and beat until smooth. Divide batter into the cupcake tins. This batter made 30 cupcakes for me.
  6. Bake for 25 minutes or until a toothpick comes out clean. Remove from oven and let cool.

For the Buttercream:

  1. Cream butter in electric mixer for 1-2 minutes until fluffy. Slowly add 1 cup sugar and beat until smooth.
  2. Add milk and mix until combined.
  3. Add remaining confectioners’ sugar, 1/2 cup at a time, and beat until well incorporated.
  4. Add vanilla seeds, extract, and food coloring, and mix at medium-high speed until light and fluffy (2-3 minutes). Add more cream or sugar as necessary to achieve proper consistency. Pipe or spread onto cooled cupcakes.
  5. Note: You will need 2 batches of frosting for the number of cupcakes. I piped the frosting with a Wilton 32 tip in a disposable decorating bag.
  6. Then I sprinkled with blue crystal sprinkles. These glow-in-the-dark stars are great for decorating the serving area.


Note 2: Yes, I realize now that I accidentally flipped Saturn and Jupiter in the picture. I am aware of the correct order of the planets, but I was hurrying to get these done before birthday boy got home from school and made a mistake.

cupcakes adapted from Chocolate Fool. Buttercream adapted from Love and Olive Oil.

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Nutrition Information
Yield 30 Serving Size 1 cupcake
Amount Per Serving Calories 316Total Fat 7gSaturated Fat 4gTrans Fat 0gUnsaturated Fat 2gCholesterol 32mgSodium 243mgCarbohydrates 62gFiber 1gSugar 50gProtein 3g offers recipe nutritional information as a courtesy and is an estimate only. This information comes from online calculators. Although makes every effort to provide accurate information, these figures are only estimates.

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Monday 31st of March 2014

Hi Katie, I love your blog and all the recipes you share with us. I wanted to know if this recipe is already adjusted for high altitude baking. If not, could you please help me adjust the recipe. Thank you! looking forward to baking these delicious cupcakes!


Tuesday 1st of April 2014

This recipes works as is for me at high altitude.


Friday 10th of May 2013

Did you use regular blue food coloring to get the bight blue color?


Saturday 11th of May 2013

I think I used sky blue


Friday 8th of February 2013

I love how these cupcakes turn out! They are really moist, and last a while without going oily and gross!

I was wondering, if I wanted to use the same recipe for a vanilla version, could I swap out the coco for one of the flours? Would this effect the overall result? And if it would work, would I use the same measurement in flour, or more, or less? And which flour, or does it matter?



Friday 8th of February 2013

Hi, glad you liked it! Try this one for a vanilla version:


Wednesday 8th of August 2012

Where did you get the pictures of the planets that are on top of the cupcakes? Those are great!


Friday 10th of August 2012

Thank you!


Wednesday 8th of August 2012

I just searched Google. Mostly NASA's site and had them color printed on cardstock at the print shop.


Wednesday 2nd of June 2010

Hi! What a wonderful idea! My son also loves the planets, and for his sixth birthday I am using your idea for his party in class. Thank you so much...the kids are going to eat 'em up!

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