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Get ready to celebrate the 4th of July with these delicious, gooey red, white, and blue blondies! This is my go-to blonde brownie recipe filled with all the patriotic candy and sprinkles. These are the perfect potluck cookie bar for your summer party!
This easy blondie recipe is next-level delicious: a showstopper dessert that will light up any celebration. I call them Fireworks Blondies because the sprinkles and M&Ms look like an explosion of July Fourth fireworks.
The secret to my famous blondie recipe is using 2 full cups of brown sugar along with eggs and baking powder to keep them super fudgy, like a brownie, but without using cocoa. They’re great plain, with M&Ms, sprinkles or anything you like!
Ingredients in 4th of July Cookie Bars
- Use unsalted butter that’s been softened. You can substitute salted butter by reducing added salt by 1/4 tsp.
- Packed Light Brown Sugar (2 full cups) keeps these extra fudgy and moist for days.
- Large eggs to bind all the ingredients better together. Be sure the eggs are at room temperature before mixing them into the batter. It just helps with the mixing process.
- A teaspoon of baking powder to help these blondie bars rise.
- You can just use sweet chocolate chips instead but I love to add patriotic M&Ms for the pop of red white, and blue colors. I have tried these blondies with butterscotch chips and oh my… so good. If you can’t pick, it’s ok to use M&Ms and chocolate chips because why not?
- Patriotic sprinkles to make these blondie bars into firework blondie bars. Make sure to use jimmies (rod-style sprinkles) not nonpareils, which will melt into the batter.
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Dorothy’s Expert Blondie Tips
- Blondies are best a bit under-baked. They’ll finish baking as they cool so take them out when they’re light golden brown and just a little bit underdone in the center.
- For best results, bake these in a metal pan. Glass will make them brown too fast on top and they’ll be raw in the middle.
Fireworks Blondies
Ingredients
- ½ cup (113g) unsalted butter
- 2 cups (400g) packed brown sugar
- 2 large eggs
- 1 teaspoon vanilla extract
- ½ teaspoon salt
- 1 teaspoon baking powder
- 2 cups (248g) all purpose flour
- 2 cups red white, and blue M&Ms
- ½ cup patriotic sprinkles
Instructions
- Preheat oven to 350°F. Line a 9×13” pan with foil and spray well with cooking spray.
- Mix butter and brown sugar with a stand or a hand mixer until crumbly. Mix in eggs and vanilla until smooth. Mix in salt, baking powder, then flour. Stir in M&Ms and sprinkles.
- Spread in prepared pan. The mixture is wet so it’s best to spray your hands with cooking spray and then smooth the dough with your hands to get an even layer. Top with extra M&Ms if desired to make them look prettier.
- Bake for about 22-25 minutes until they start to turn golden. Err on the side of under baked with these – they’ll finish baking as the cool and you don’t want them over baked.
Notes
- For best results, bake in a metal pan.
- Store in an airtight container for up to 4 days or freeze for up to 3 months.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
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How to make 4th of July Blondies
- The butter and brown sugar will be crumbly when creamed (unlike a traditional creamed cookie dough).
- The eggs will make the batter pretty wet.
- The finished cookie dough will come together but be wetter than a traditional dough; almost a cross between cookie dough and brownie batter.
- The mixture is wet so it’s best to spray your hands with cooking spray and then smooth the dough with your hands to get an even layer when spreading in your pan.
FAQs
Your blondies probably didn’t make through because they needed to be left in the oven a bit longer. Bake them for about 22-25 minutes and watch for them to turn golden brown.
Yes. You need to use baking powder for this blondie recipe to help the cookie bar rise during the baking process.
Yes. You can freeze blondies for up to 1 month in an airtight container or sealed plastic bag.
Do you melt the butter, or leave room temp.?
Softened butter for these!
Loved them
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