Firecracker Sundae Brownie Bars
April 24, 2026
A layered brownie and cookie bar topped with red, white, and blue ice cream and tons of sprinkles for a fun summer dessert!
Firecracker Sundae Brownie Bars are such a fun dessert for summer pool days and long summer nights. There’s something about a brownie loaded with ice cream and sprinkles that brings back all the best parts of summer. These start with brownie mix and store-bought cookie dough, so they keep things semi-homemade. Right before serving, pile on the patriotic ice cream, marshmallow cream, and extra sprinkles because a little extra fun belongs in summer desserts.
Flavor Profile
These bars start with a rich, fudgy brownie base with little pops of crunch from patriotic sprinkles baked inside. The cookie dough layer adds a soft sugar cookie flavor that makes each bite taste even sweeter. Once you add the cold red, white, and blue berry-flavored ice cream and marshmallow topping, it turns into a brownie sundae with cool berry flavor, soft sugar cookie pieces, and gooey chocolate brownie in every bite.
Why You’ll Love This Recipe
- It starts with brownie mix and pre-made cookie dough, which keeps prep quick and simple.
- The brownie and sugar cookie combination gives you a fun brookie-inspired base before the sundae toppings go on.
- The ice cream topping makes this feel more fun than your average holiday brownie tray.
- Perfect for Fourth of July parties, pool days, and summer cookouts.
- You can easily switch up the ice cream flavor depending on what you find at the store.
The Twist
Instead of serving plain brownies at your holiday party, these get transformed into individual brownie sundaes. The baked cookie dough layer already makes them more fun, but adding patriotic ice cream and marshmallow cream right before serving gives them that messy ice cream truck meets backyard barbecue twist.
Ingredient Highlights
- Brownie Mix: Use your favorite boxed brownie mix and follow the package instructions. Fudgy brownie mixes work especially well here.
- Patriotic Cookie Dough: PILLSBURY™ READY TO BAKE!™ Red, White & Blue Cookie Dough keeps this recipe quick and adds a festive sugar cookie layer. Let it soften slightly before breaking it apart.
- Red, White, And Blue Ice Cream: Use any patriotic-themed flavor you can find. Vanilla with colorful swirls also works well.
- Marshmallow Cream: Adds a gooey topping that feels very ice cream sundae-inspired.
- Patriotic Sprinkles: Adds color inside the brownies and on top for extra fun.
Firecracker Sundae Brownie Bars
Ingredients
- 1 box brownie mix, plus ingredients listed on the box
- Patriotic sprinkles
- 1 package PILLSBURY™ READY TO BAKE!™ Red, White & Blue Cookie Dough, softened slightly for easier handling
- Red, white, and blue ice cream
- Marshmallow cream
- Extra patriotic sprinkles, for topping
Instructions
- Preheat your oven according to the brownie package directions. Spray a 9-inch square baking dish with baking spray and line it with parchment paper for easy removal.
- Prepare the brownie batter according to the package instructions and spread it evenly into the prepared pan.
- Scatter patriotic sprinkles over the brownie batter.
- Break the softened cookie dough into small pieces and evenly place them over the top of the brownie batter. Don’t press them down too much.
- Bake according to the brownie package directions. If the center still looks underdone, continue baking in 2 to 3-minute increments until set.
- Let the brownies cool completely before slicing.
- Serve each brownie bar topped with a scoop of red, white, and blue ice cream, a drizzle of marshmallow cream, and extra sprinkles.
FAQ
Can I make these ahead of time?
Yes. Bake the brownie bars a day ahead and store them covered at room temperature. Add the ice cream and toppings right before serving.
Do I need patriotic ice cream?
No. Vanilla, birthday cake, cookies and cream, or even strawberry ice cream would all work well.
Can I freeze the brownies?
Yes. Freeze the baked brownies without toppings. Thaw before serving and add fresh toppings later.
How do I know when the brownies are done?
Check the center with a toothpick. You want moist crumbs, not wet batter. Since cookie dough is added on top, they may need a few extra minutes.
Can I use homemade brownie batter?
Absolutely. If you have a favorite homemade recipe, use it. Just keep the same pan size.
Sprinkle of Fun
Serve these after your neighborhood fireworks show while everyone hangs out on lawn chairs waiting for the finale. Add sparklers for the kids and keep napkins nearby because these get a little bit messy.
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If you like Firecracker Sundae Brownie Bars, then you’ll love the recipes below.
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