Colorful Galaxy Cupcakes

Featured in Treats That Make Everything Better.

Vanilla cupcakes made with a fun blend of colorful frosting swirls in purple, pink, and blue, topped off with shiny sprinkles for a cosmic vibe.
Clare Recipes
Updated on Mon, 17 Mar 2025 16:55:48 GMT
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Colorful Galaxy Cupcakes | recipesclare.com

I whipped up these galaxy cupcakes for my niece's space party, and they got more oohs and aahs than her gifts. There's something truly special about biting into a vanilla cupcake with cosmic color swirls that makes everyone pause and grin. The hidden star sprinkles inside create that wow moment that turns a simple sweet treat into something memorable. I've tweaked this recipe through countless kids' parties, science events, and even while watching a rocket launch at my neighbor's get-together.

My buddy Sarah always says she "can't stand frosting" but somehow ate three of these at our book group. When I caught her looking at the leftover ones, she chuckled and told me, "It's those sprinkles inside - they make me feel young again!" That's exactly why I adore these cupcakes - they bring out that childish wonder in whoever tries them.

Heavenly Components

  • All-purpose flour: Gives these cupcakes their perfect body. I tried using cake flour before, and while they came out a bit softer, they couldn't handle the topping and filling well. All-purpose hits that sweet spot.
  • Buttermilk: This is my go-to trick for super juicy cupcakes. Its tang cuts the sweetness just right, and it works with the baking soda for a nice lift. No buttermilk? Just add a spoon of white vinegar or lemon juice to regular milk and wait 5 minutes.
  • Vegetable oil: I've learned oil makes softer, juicier crumbs than butter in this mix. Its plain taste lets the vanilla stand out. Don't swap in olive oil unless you want your stars tasting like a garden salad.
  • Cocoa powder (optional): A tiny bit makes the mix slightly darker for that "space" feel without making them taste chocolatey. I usually throw some in, but they still look great without it.
  • Blue food dye: Adds a light blue hint that ups the space theme. Grab gel coloring for bright results without messing up your batter texture. I've skipped this step before, and while they still tasted yummy, they missed that special space look when you bite in.
  • Vanilla extract: Don't cut corners here! The vanilla flavor runs the show. I spend extra on good vanilla for these, and you can really tell the difference.
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Space-Age Assembly

Getting your mix ready:
Use room temp stuff for the smoothest batter. I mix dry things first so the rising agents spread out well. When adding wet stuff, stir just until mixed - too much stirring makes tough cupcakes. Your batter should look smooth but not beaten too hard.
Cooking them right:
Only fill your paper cups halfway - this matters! Too full cups make domed tops that are tricky to frost and leave no space for the sprinkle center. The touch test works great - if you softly press the top and it bounces back, they're done. If your finger leaves a dent, give them another minute.
Making the sprinkle hideaway:
After they've totally cooled (and I mean TOTALLY - being patient pays off), use an apple corer or small knife to cut out the middle of each cupcake. Don't go all the way down; about halfway is perfect. Keep those cake bits for snacking - that's your baker's bonus!
Handling multicolor frosting:
The trick to awesome galaxy frosting is using colors carefully. Too much food dye looks fake instead of space-like. I put in just a drop or two at a time and mix gently to keep those distinct color streaks.
Getting the piping just right:
Using plastic wrap is my favorite way for the cleanest, most eye-catching results. Put colors next to each other rather than piling them for better swirls. When piping, start at the outer edge and move inward with steady pressure for that nice spiral.
Adding star decorations:
Scatter the edible glitter and stars right after piping while the frosting is still sticky enough for them to stay put. I keep extra sprinkles nearby and use tweezers to place any bigger star sprinkles exactly where I want them to make them look extra fancy.

My first try at these galaxy cupcakes was a complete mess. I rushed the cooling part and ended up with runny frosting that looked more like a space crash than a pretty nebula. Now I know patience matters - rushing any part leads to problems. Another hard lesson came when I used liquid food coloring in the frosting and got a watery, separated disaster. Gel food coloring is definitely worth buying for these showstoppers.

Stunning Presentation

Make these galaxy cupcakes even more impressive by setting them on a black cake plate or tray with extra edible glitter scattered around. For kids' parties, I've put them on a tiered stand with little toy rockets and astronauts for a full space theme. They look great with blue or purple drinks for a matching color scheme.

Starry Alternatives

Once you get the hang of the basic method, try different color mixes for unique galaxy looks. Dark blue, purple, and silver make a gorgeous night sky. For a sunset galaxy, try pink, orange, and yellow. During Christmas, red, green, and white create a festive space theme. You can also play with the filling - tiny chocolate chips look like a "meteor shower", while colored sugar crystals give a stardust effect.

Keeping Them Fresh

These cupcakes stay yummy and soft for up to three days when kept in a sealed container at room temp. The frosting forms a light crust that actually helps protect the swirled colors. Only put them in the fridge during really hot weather, and if you do, let them warm up before eating for the best taste and texture. I wouldn't freeze them after frosting since the decorations can get damp when thawing.

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I've baked these galaxy cupcakes for tons of birthdays, school functions, and even my brother's star-gazing club. Something about how fun they look brings out that kid-like joy in everyone. While they might seem complicated, the process is actually pretty forgiving. Even when my swirls aren't perfect or my colors blend too much, they still look magical once I add that sprinkle of edible glitter. That's what's cool about galaxies – they're naturally imperfect, so there's no pressure to make "perfect" cupcakes.

Frequently Asked Questions

→ Can I swap gel coloring for liquid food dye?
Sure, but gel colors pop more without making the frosting runny. If you use liquid dye, you might need extra drops and a little less liquid elsewhere.
→ What's the easiest way to get frosting swirls?
Use plastic wrap! Spread lines of different frosting on it, roll it up, drop it in a piping bag, and swirl effortlessly while piping.
→ Can I bake these cupcakes in advance?
Absolutely! Make the cupcakes and store them airtight for up to 2 days. Add the frosting on serving day to keep them fresh and pretty.
→ What are some alternatives to star sprinkles?
Anything shiny works! Try silver balls, pearl-like sprinkles, edible glitter, or crushed candy to give that space theme.
→ Is buttermilk a must-have for this recipe?
It keeps the cupcakes soft and moist. Got none? Mix 1 tablespoon lemon juice or vinegar into milk, rest for 5 minutes, and you're good to go.

Colorful Galaxy Cupcakes

Light, airy vanilla cupcakes decorated with mixed-color frosting swirls and sparkling star sprinkles. They're sure to wow everyone at the table!

Prep Time
30 Minutes
Cook Time
45 Minutes
Total Time
75 Minutes

Category: Sweet Stuff

Difficulty: Intermediate

Cuisine: American

Yield: 20 Servings (20 cupcakes)

Dietary: Vegetarian

Ingredients

→ Cupcakes

01 375ml (1 1/2 cups) buttermilk
02 3 large eggs
03 1 teaspoon baking soda
04 1/2 teaspoon salt
05 430g (2 1/3 cups) plain flour
06 2 teaspoons baking powder
07 265g (1 1/2 cups) superfine sugar
08 2 tablespoons cocoa powder, optional
09 2 tablespoons blue gel food dye, optional
10 125ml (1/2 cup) vegetable oil
11 2 teaspoons vanilla essence

→ Frosting

12 A batch of American or Swiss meringue buttercream
13 Blue shade: 2 drops of sky blue dye
14 Purple tone: Mix 2 drops pink and 2 drops purple gel dye
15 Pink shade: Add 2 drops deep pink gel dye

→ Decorations

16 Galaxy-themed edible sprinkles
17 Optional edible glitter
18 Small silver star sprinkles

Instructions

Step 01

Switch on your oven to 356°F (180°C) for standard or 320°F (160°C) if using a fan. Set up 20 cupcake wrappers in the pans.

Step 02

Toss together your flour, sugar, salt, baking powder, baking soda, and cocoa (if using) in a large bowl. Use a low mixer speed or sift everything well manually.

Step 03

Blend the eggs, oil, buttermilk, vanilla, and optional blue dye in a big jug until they’re combined.

Step 04

Pour the wet stuff slowly into the dry mixture while mixing gently. Scrape the bowl a bit, then mix briefly again until smooth in texture.

Step 05

Fill each liner halfway with batter and bake for 30 minutes. When gently pressed, the tops should spring back a little. Let them fully cool on a wire rack.

Step 06

Once the cupcakes are cool, cut out small centers with a corer or knife. Drop in some star-shaped sprinkles for a fun filling.

Step 07

Separate the buttercream into three bowls. Make one purple (mix pink and purple), one pink, and one blue following the color guide. Stir each until it’s consistent.

Step 08

Fit a Wilton 6B nozzle onto a piping bag and rest it in a tall cup. Add alternating spoonfuls of all three icing colors until you’ve filled the bag halfway.

Step 09

Pipe strips of each frosting color onto plastic wrap, arranging them side by side. Roll the wrap like a log, snip one end, and slip it into a piping bag with a Wilton 6B tip.

Step 10

Pipe swirls of frosting onto each cupcake, moving from the outside in. Add edible glitter and star sprinkles while frosting is still soft.

Notes

  1. For swirling colors in the frosting, the plastic wrap technique gives the prettiest results.
  2. Adding hidden sprinkles inside is optional but adds a great surprise!
  3. The blue dye in the batter is not required—it simply adds a galactic touch.

Tools You'll Need

  • Muffin tray
  • Cupcake wrappers
  • Stand or hand mixer
  • Measuring tools
  • Mixing bowls
  • Optional cupcake corer
  • Pastry bags
  • Wilton 6B decorating tip

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Made with wheat (flour)
  • Includes dairy (buttermilk, frostings)
  • Contains eggs

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 178
  • Total Fat: 8 g
  • Total Carbohydrate: 25 g
  • Protein: 3 g