Rainbow Galaxy Brownie Cookies
January 19, 2026
Soft brownie cookies loaded with rainbow crunch for a fun, cosmic-style treat!
Let me tell you about one of the easiest, most fun chocolate treats you’ll ever make. These Rainbow Galaxy Brownie Cookies start with a simple box of brownie mix and turn into the fudgiest, chewiest cookies with little pops of colorful crunch in every bite. They’re the kind of dessert you throw together when you want something chocolatey and fun without spending all day in the kitchen. No frosting, no stress, just big brownie flavor with a rainbow twist.
Why You’ll Love This Recipe
- Soft and fudgy brownie cookies with a chewy center
- Made with a simple brownie mix for quick prep
- Packed with mini chocolate chips and rainbow candy chips
- No frosting needed for less mess and faster baking
- Perfect for parties, movie nights, and themed events
- Fun, colorful cookies with classic chocolate flavor
- Easy dessert recipe for all skill levels
- Great make-ahead treat that travels well
Ingredient Notes
- Brownie mix: The base of this recipe and the reason these cookies have such a rich, fudgy chocolate flavor. Any standard 18 to 20-ounce box works great.
- Eggs: Help bind the dough and keep the cookies soft and chewy instead of crumbly.
- Vegetable oil: Adds moisture so the cookies stay fudgy and don’t dry out while baking.
- Mini chocolate chips: Melt into the dough for extra chocolate flavor in every bite.
- Rainbow candy-coated chocolate chips: Give the cookies their colorful galaxy look and a fun crunchy texture on top.
Quick Prep Notes
Can I use any brand of brownie mix?
Yes, any standard 18 to 20-ounce box of brownie mix works well. Just avoid family-size or mini boxes since the ratios will be off.
Why does the dough look thicker than regular cookie dough?
Brownie mix creates a thicker, fudgier dough by design. It should be scoopable but not runny.
Do I need to chill the dough first?
No chilling is needed. The dough bakes best when scooped and baked right away for soft, chewy centers.
Rainbow Galaxy Brownie Cookies
Ingredients
- 1 box brownie mix
- 2 eggs
- 1/3 cup vegetable oil
- 1/2 cup mini chocolate chips
- 1/2 cup rainbow candy-coated chocolate chips
Instructions
- Stir everything together until the dough is thick but easy to scoop.
- Use a tablespoon-sized cookie scoop to drop dough onto a parchment-lined baking sheet. Press a few extra rainbow chips on top for that classic cosmic look.
- Bake at 350°F for 9 to 11 minutes, just until the edges are set and the centers are still soft. Let them cool slightly so they can firm up into chewy, fudgy brownie cookies.
FAQ
Can I make these cookies ahead of time?
Yes, these cookies stay soft for several days when stored in an airtight container at room temperature.
Can I freeze Rainbow Galaxy Brownie Cookies?
You can freeze the baked cookies for up to two months. Let them thaw at room temperature before serving.
What if I only have regular chocolate chips?
Regular chocolate chips work fine. Mini chips just spread more evenly through the dough.
Can I add other mix-ins?
Yes, white chocolate chips, peanut butter chips, or mini M&Ms all work great with this recipe.
How do I keep the cookies soft?
Slightly underbake them and store them in a sealed container to lock in moisture.
Sprinkle of Fun
Take these Rainbow Galaxy Brownie Cookies to an 80s-themed roller skating party night and let them shine right alongside the neon lights. The colorful candy chips totally match the retro vibes, and they’re easy to grab between skate sessions. Pair them with a bright punch or classic soda, throw on your favorite throwback playlist, and enjoy a sweet treat that feels just as fun as the night itself.
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