July 8, 2025
Funfetti Brookie Bars are the ultimate dessert mashup—chewy brownies meet sprinkle-loaded sugar cookie dough in one colorful bite. Made with a boxed brownie mix and a sugar cookie base, this recipe keeps things simple but delivers major fun. From birthday parties to rainy-day baking, Funfetti Brookie Bars are always a hit.
Do I need to prepare both mixes separately?
Yes—make the brownie mix and sugar cookie dough separately, following each package’s directions before combining them in the pan.
Can I use a different size pan?
A 9-inch square pan gives the best thick, even bake. You can use an 8-inch for thicker bars (add more time) or a 9×13-inch for thinner bars (reduce baking time slightly).
Will the sugar cookie dough sink into the brownies?
It may swirl slightly as it bakes, but that’s part of the charm. Gently pressing the cookie dough on top helps it hold shape.
5 Stars 4 Stars 3 Stars 2 Stars 1 Star
5 from 1 review
Can I use homemade brownie or cookie dough instead of boxed?
Yes, just make sure both have a similar consistency to boxed mixes so they bake evenly.
How do I know when it’s done baking?
The edges should be golden and set, and the center should no longer jiggle. A toothpick may come out slightly fudgy—don’t overbake.
Can I make this ahead of time?
Yes! Chill overnight for a chewier texture or freeze the bars for up to 2 months.
How should I store leftovers?
Store in an airtight container at room temperature for 3–4 days or in the fridge for up to a week.
Can I double the recipe?
Absolutely. Use a 9×13-inch pan and keep an eye on the baking time—expect a few extra minutes.
Put on your favorite HGTV redecorating show, grab a notebook, and start sketching out your next home makeover while enjoying a square (or two) of these Funfetti Brookie Bars with a big glass of milk. Just one rule—no taking inspo from Decorating Cents. EEK!
Buttery, sweet sugar cookie cups filled with vanilla buttercream and rainbow sprinkles!
featured recipe
Thank you for this easy and delicious recipe!! I’m a baker and love to make cookies from scratch but this recipe is actually my new favorite and go-to for birthday parties. Thanks again for sharing!! 🙂
I am the SAME WAY! Sometimes I wanna make dough from scratch and sometimes I wanna just stir two things together lol!! Thank you so much for the comment 🙂