Christmas Tree Cosmic Brownies
These Christmas tree Cosmic Brownies are fun, festive, and so easy! Chocolate brownies are cut into Christmas tree shapes, then topped with green frosting for the tree color and decorated with candy-coated chocolate chips for the ornaments.

I love making sweet treats this time of year, and brownies are always high on my list of baked goods to serve friends and family. They’re so easy to make and equally easy to decorate, as I’m showcasing here with these Christmas tree brownies.
These adorable brownies are made with boxed brownie mix and a simple frosting, so they’re as easy as they are festive and delicious!
Why You’ll Love These Christmas Tree Cosmic Brownies
- Limited Ingredients: It only takes a handful of simple ingredients to make these brownies.
- Easy: These are made with boxed brownie mix and a simple white chocolate icing.
- Festive: The green top and candy ornaments make these brownie trees so festive!
- Delicious: You can’t beat brownies and frosting!
Ingredients
- 1 box of brownie mix – prepared according to the package directions
- 1/3 heaping cup heavy cream
- 12-ounce bag of white chocolate chips
- Green food coloring
- Candy-coated mini chocolate chips
Substitutions and Variations
- Homemade: If you want to take the time, feel free to use your favorite homemade brownie recipe.
- Pre-Made Frosting: Save even more time by buying pre-made frosting and adding green food coloring to it.
- Candies: You can use holiday-colored candy-coated chocolates for the decorations, as well.
Equipment
- Measuring cups and spoons
- 9×13 baking pan
- Sharp knife
- Triangle or Christmas tree cookie cutters (optional)
How to Make Christmas Tree Cosmic Brownies
1: Spray a 9×13 baking pan with nonstick spray, then line it with parchment paper, leaving an overhang along the sides to make it easier to remove the brownies later.
2: Prepare and bake the brownies according to the package directions.
3: Transfer the baking pan to a wire rack and let the brownies cool completely.
4: Microwave the heavy cream for 60 to 90 seconds in a microwaveable bowl until hot. Then, add the white chocolate chips and stir until completely melted and slightly cool.
5: Mix the green food coloring into the frosting until it reaches your desired color.
6: Pour the frosting over the brownies and sprinkle it with the candy-coated chocolate chips.
7: Place the pan in the refrigerator for an hour to allow the frosting to set.
8: Lift the cooled brownies out of the pan. Then, use a sharp knife to cut the brownies lengthwise into three strips. Cut each strip into triangles. You could also use a triangle or Christmas tree cookie cutter.
Storage
Refrigerator: Store for up to five days in an air-tight container.
Freezer: Wrap the brownies in plastic wrap and store for up to 2 months in an air-tight, freezer-safe container. Defrost overnight in the fridge before serving.
What to Serve with Christmas Tree Cosmic Brownies
Serve these brownies with a glass of milk or a cup of coffee or tea. They also make a great addition to a larger dessert spread with more holiday favorites like snack mixes, cupcakes, cakes, and your other favorite sweet treats.
Tips
- It’s so much easier to remove the brownies if you leave an overhang of parchment paper to act as handles.
- Fully cool your brownies before cutting them, and use a sharp knife to eliminate tearing.
- If you don’t have green food coloring, you can mix yellow and blue until you achieve your desired color.
More Christmas Recipes
- Copycat Lofthouse Christmas Cookies
- White Chocolate Oatmeal Christmas Cookies
- Chocolate-Dipped Christmas Cookies
FAQ
You can use your favorite brand and variety. They all work. You can even make your own homemade brownies for them.
Normally, you never want to refrigerate brownies. However, these brownies are topped with frosting made with heavy cream. Because of the dairy, these brownies have to be refrigerated.
You can. You could buy pre-made frosting of your choice and add green food coloring to it.
Christmas Tree Cosmic Brownies
Ingredients
- 13.25 ounces brownie mix batter prepared according to package directions
- 1/3 cup plus 2 tablespoons heavy whipping cream
- 12 ounce white chocolate chips
- Green food coloring
- Candy coated mini chocolate chips
Instructions
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Preheat the oven to the baking temperature indicated on the box of brownie mix.
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Prepare a 9×13-inch baking pan by lining it with parchment paper, leaving overhang along the sides to make it easier to lift the brownies out of the pan after baking.
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Spread the brownie batter evenly into the prepared baking pan, then bake according to the package directions. Remove from the oven and cool the brownies to room temperature in the pan.
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Pour the heavy cream into a medium microwave-safe bowl and heat in the microwave on high for 60-90 seconds until hot. Add the white chocolate chips and stir until completely melted, then mix in green food coloring until your desired color is reached.
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Pour the frosting over the brownies and spread out evenly. Sprinkle the candy-coated mini chocolate chips all over top of the frosting.
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Place the pan of frosted brownies in the refrigerator to chill until the frosting is completely set; about 1 hour.
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Once set, lift the brownies out of the pan. Use a sharp knife to cut the sheet of brownies longways across into three strips. Cut each strip into triangles to resemble Christmas trees.
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