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Cosmic Cuisine: Stargirl Sugar Cookie Sandwiches

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Stargirl is one of the sweetest superheroes that’s ever graced the DC universe. With her show returning to the CW for the fall season and the first two episodes (“The Murder” and “The Suspects”) having already aired, I wanted a sweet treat to munch on while watching. These red, white, and blue sandwich cookies are perfect. My kids had a blast making them with me (and eating them!).

Yield: 2 Dozen Sandwiches

Stargirl Sugar Cookies

Stargirl cookies

These red, white, and blue sandwich cookies are every bit as sweet as Stargirl and their great taste will bring any villain to their knees!

Prep Time 30 minutes
Cook Time 6 minutes
Additional Time 1 hour
Total Time 1 hour 36 minutes



  • 3/4 c softened butter
  • 1 c sugar
  • 2 eggs
  • 1 tsp vanillia
  • 2 1/2 c flour
  • 1 tsp baking powder
  • 1 tsp salt
  • red food coloring
  • blue food coloring

Buttercream Filling

  • 2 1/4 cup powdered sugar
  • 1/2 cup softened butter
  • 2 Tbsp milk
  • 2 tsp vanilla


  1. Preheat oven to 400°F.
  2. Cream butter and sugar.
  3. Add Eggs and vanilla.
  4. In a separate bowl combine the flour, baking powder, and salt.
  5. Add flour mixture to the butter mixture 1/2 c at a time.
  6. Split dough into 2 separate but equal lumps and place in different bowls.
  7. Add red food coloring to one bowl and blue to the other. Mix coloring into dough until a uniform color is reached of the desired depth.
  8. Chill dough for one hour before rolling out.
  9. Lightly flour counter and rolling pin. Take one color of dough out of the fridge and roll out to 1/8" thickness. Cut out cookies with a star shaped cookie cutter and transfer to a parchment paper covered baking sheet.
  10. Re-roll dough and cut more stars. Continue until dough is gone.
  11. Once one color of dough is completely rolled out, bring the other one out of the fridge and repeat.
  12. Chill cookies in the fridge for 15 minutes before baking.
  13. Bake for 6 to 8 minutes. DO NOT OVER BAKE. It will be difficult to tell if the cookies are done by color so lightly touch cookies to feel for doneness. Cookies will continue to cook as they cool on the tray.
  14. Allow cookies to cool on baking tray for 5 minutes, then transfer to wire cooling rack to completely cool.
  15. Once cookies are cooled it's time to make the cream filling. Mix together 1/2 c butter with 2 tsp vanilla, 2 Tbsp milk and 2 1/4 c powdered sugar.
  16. Once cream is fully mixed fill a piping bag fit with a piping tip. The exact size and shape is not important but the large star tip made it easy to cover the cookies and made a nice visual pattern when the sandwiches were assembled.
  17. Pipe the buttercream filling onto half the cookies. Top with a cookie of the opposite color (red cookie, white frosting, blue cookie)

 Stargirl sugar cookie sandwiches dough

We started off by mixing up the dough. As always, I used my handy stand mixer to make the base dough. If you don’t have one, no problem, it just means a little more elbow grease. We mixed the food coloring in by hand. It took a bit of effort but we made it there in the end.

In order to achieve the deep colors I wanted instead of pastels we had to use a lot of food coloring but it didn’t affect the flavor and it was worth it for the awesome visual of the finished cookies. The more you mix the dough, the more smooth and consistent the color, as seen with the red. However, if you prefer a more marbled appearance like the blue dough, there’s no need to mix the dye completely in.

Stargirl sugar cookie sandwiches dough
LtR: Plain mixed sugar cookie dough, red dyed dough, and blue dyed dough

As with most baked goods, it’s really important to keep the dough chilled. This is because of the butter. Warm butter makes runny dough that will spread too far. When the dough spreads there are three main problems: First, the dough will be sticky, making rolling and cutting the cookies difficult. Second, with shaped cookies, the shapes will be warped or off instead of having crisp, clear shapes. Finally, the cookies will spread too thin and cook too fast, resulting in burned cookies. So place the dough in the fridge between each step and especially right before going in the oven for the best results.

The Baking

Now when it comes to baking, don’t overbake the cookies! The cookies for the Stargirl sugar cookie sandwiches are meant to be soft, over baking will make them hard and when you try to eat them the filling will squirt out the sides.

It can be a little difficult to tell if the cookies are done just by sight because of the coloring so gently touch a cookie to check for doneness. If the cookie is easy to push and doesn’t feel raw then take them out. It is best to err on the side of caution because the cookies will continue to bake on the tray for a few minutes as they cool.

Stargirl Sugar Cookies Sandwiches cookies
Tray of baked cookies

Make sure to fully cool the cookies before trying to cover them with the buttercream filling. If the cookies are even a tiny bit warm then the filling will melt and run out of the sandwich. The cookies will also bend and break if you try moving and stacking them while they’re still warm so give them plenty of time to cool, preferably on wire racks.

The Filling for the Stargirl sugar cookie sandwiches

Usually, I say that cooking is an art but baking is a science. Take any liberties you want when cooking but stick to the recipe when baking. However, this frosting is an exception. If the cream is too thin, add more powdered sugar. If it is too thick add a little milk. Just be careful, a little liquid goes a long way with this frosting. You can also add more or less sugar for your own personal sweetness level, just taste as you go!

This buttercream frosting recipe is also great for the top of cookies, cupcakes, and cakes. It can be dyed any color with just a little food coloring. It is also easy to change the flavor by using different flavoring. Just be aware that you may need more or less of different flavorings because different extracts are different strengths. Just take it slow and taste it often until it is perfect for you!

Stargirl Sugar Cookie Frosting
LtR: Filling a piping bag with buttercream, Piping the center of the sandwich, and complete look.

If you don’t have a piping bag just use a plastic storage bag. Pick a bottom corner to fill towards and twist up the bag like a piping bag. If you don’t have a piping tip, that’s okay too, just clip the corner of the bag and squeeze. It won’t make the same pattern with the filling, but it will fill the cookie just fine and that’s the most important thing.

A fun and easy and delicous cookie recipe

These cookies were fun and easy to make and they looked amazing when we were done. The colors were vibrant and completely reminded me of Stargirl. A plate of these will look great sitting out at any viewing party or on the counter waiting as a special treat for the kids while they watch Stargirl kick butt.

Stargirl is currently airing Wednesdays on The CW and the next day on The CW App. And if you haven’t seen the latest from Cosmic Cuisine, check out She-Hulk’s Smashing No-Bake Key-Lime Pie recipe!

She-Hulk’s Smashing No-Bake Key-Lime Pie

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Luna Gauthier

I've always been a bookworm and fantasy is my favortie genre. I never imagined (okay, I imagined but I didn't think) that I could get those books sent to me for just my opinion. Now I am a very happy bookworm! @Lunagauthier19 on Twitter

Luna Gauthier has 229 posts and counting. See all posts by Luna Gauthier