Irresistible July Frosted Sugar Bars

Category: Sweet Treats Without Turning On the Oven

Soft and chewy sugar cookie bars, finished with a velvety vanilla buttercream and a flourish of colorful sprinkles, make any Independence Day gathering feel special. Rich in flavor yet light in texture, these bars combine simple pantry ingredients and come together quickly in just one pan. The smooth frosting locks in moisture, keeping them fresh and irresistible for days. Perfect for sharing at picnics, parties, or after the fireworks, these festive treats offer a sweet finish to your July celebrations. Adjust sprinkle colors to match any occasion or personal taste preferences for a versatile dessert option.

A woman with a smile on her face.
Created By Melanie Carter
Updated on Fri, 27 Jun 2025 16:14:03 GMT
A slice of a frosted sugar cookie bar. Pin
A slice of a frosted sugar cookie bar. | mellierecipes.com

Festive sugar cookie bars bring the ultimate burst of color and sweetness to any Fourth of July table. These delicious bars are soft and tender with a rich, buttery base and are topped with luscious vanilla buttercream before getting showered in vibrant sprinkles. They come together fast and never fail to wow at parties—I have made these every summer since my kids were little, and they always disappear quickly from the dessert tray.

I first made these bars when my oven broke and I could not do individual cookies for a block party. Now I make them yearly, and my neighbors look forward to bringing home extra slices.

Ingredients

  • Unsalted butter: Room temperature butter makes every bite rich and ensures the batter is fluffy and creamy
  • Powdered sugar: Used in the batter for extra tenderness and in the frosting for velvety texture sift for the smoothest results
  • Granulated sugar: Gives classic sweetness and a great soft crumb choose a fine grain if possible
  • Large eggs: Bind everything together for soft cookie bars fresher eggs always blend better
  • Pure vanilla extract: Delivers warm bakery flavor always pick real vanilla for the best taste
  • All-purpose flour: The structural base use fresh flour for a light texture
  • Salt: Enhances all the flavors
  • Baking powder: Helps the bars rise softly look for aluminum free for a cleaner taste
  • Milk: Needed for buttercream choose whole milk for richness but any milk can work
  • Decorative red white and blue sprinkles: Add festive flair and crunch pick bold vibrant sprinkles for pop

Step-by-Step Instructions

Prep the Pan:
Grease a 9x13 inch baking pan thoroughly and line with parchment paper cut to size for easy removal later
Cream the Butters and Sugars:
In a large bowl beat the room temperature butter powdered sugar and granulated sugar together for several minutes until the mixture is light and fluffy This step is essential for a soft cookie texture
Add Eggs and Vanilla:
Mix in the eggs one at a time beating well after each addition Stir in the vanilla extract until fully combined
Mix Dry Ingredients:
In a separate bowl whisk together the flour salt and baking powder Make sure it is evenly mixed with no lumps
Combine Wet and Dry Ingredients:
Gradually add the dry flour mixture to the wet butter and sugar mixture Mix only until everything comes together do not overwork the dough for the softest bars
Spread and Bake:
Press the dough evenly into the prepared pan smoothing the top Bake at 350 degrees Fahrenheit for 18 to 22 minutes or until the edges are lightly golden Do not overbake Cool completely in the pan
Make the Buttercream Frosting:
Beat room temperature butter in a clean bowl until creamy Slowly add powdered sugar followed by the milk and vanilla extract Beat until fluffy and smooth Add more milk if too stiff or more sugar if too loose
Frost and Decorate:
Spread the frosting evenly over the cooled bars Sprinkle generously with red white and blue decorations while the icing is still tacky to help them stick
Slice and Serve:
Use parchment to lift the whole cookie slab out of the pan Place on a cutting board and cut into squares for easy serving
A slice of a frosted sugar cookie with red, white and blue sprinkles. Pin
A slice of a frosted sugar cookie with red, white and blue sprinkles. | mellierecipes.com

I always look forward to adding the sprinkles my favorite part as my kids love helping choose the most colorful mix Some of our best July Fourth memories are laughing together as the bars get showered in color

Storage Tips

Keep sugar cookie bars in an airtight container at room temperature for up to three days If you live somewhere humid a layer of wax paper between bars prevents sticking For longer storage freeze bars unfrosted for up to one month then frost and decorate after thawing

Ingredient Substitutions

Swap milk in the buttercream with dairy free milk for a vegan twist If needed use a good quality gluten free all purpose flour Important to sift it well For the butter a plant based stick can often work in these bars just make sure it has a similar fat content to dairy butter

A slice of a frosted sugar cookie bar. Pin
A slice of a frosted sugar cookie bar. | mellierecipes.com

Serving Suggestions

Pair with fresh summer berries on the side for a festive dessert plate For parties cut bars into smaller bite sized squares so guests can sample other desserts These are also fun for birthday parties—just change the sprinkle colors to match your theme

Cultural and Historical Context

Sugar cookies have roots in early American baking and the bar format mirrors the practicality of community events and celebrations The Fourth of July version draws inspiration from classic bake sale and potluck treats that gather neighbors together You get all the joy of a decorated sugar cookie with a fraction of the work making it a true crowd pleaser

Recipe FAQs

→ How do you achieve a soft and chewy texture?

Using room-temperature butter and not overbaking the bars ensures they stay tender and moist.

→ Can I make these bars ahead of time?

Yes, store them in an airtight container for up to 3 days. Frost just before serving for best results.

→ What type of sprinkles work best?

Decorative jimmies or nonpareils in red, white, and blue add festive flair, but any color can be used.

→ Can I adjust the frosting consistency?

Absolutely. Add more milk for a softer texture or extra powdered sugar for a stiffer spread.

→ Is it possible to halve the batch?

Yes, simply reduce ingredient quantities by half and use an 8x8-inch pan for a smaller batch.

→ What is the best way to cut clean squares?

Chill the bars briefly before slicing, and wipe your knife clean between cuts for neat edges.

4th of July Frosted Sugar Bars

Soft, buttery sugar cookie bars with vanilla frosting and festive sprinkles. Great for parties or summer celebrations.

Prep Time
13 minutes
Cooking Duration
22 minutes
Overall Cooking Time
35 minutes
Created By: Melanie Carter

Recipe Category: No-Bake Desserts

Skill Level: Beginner-Friendly

Cuisine Style: American

Result Amount: 24 Portions (24 bars)

Diet Preferences: Suitable for Vegetarians

What You’ll Need to Make This

→ Sugar Cookie Batter

01 170 grams unsalted butter, at room temperature
02 30 grams powdered sugar
03 150 grams granulated sugar
04 2 large eggs
05 5 millilitres pure vanilla extract
06 280 grams all-purpose flour
07 2.5 millilitres salt
08 5 millilitres baking powder

→ Buttercream Frosting

09 113 grams unsalted butter, at room temperature
10 315 grams powdered sugar
11 45–60 millilitres milk
12 5 millilitres pure vanilla extract
13 Red, white, and blue sprinkles or preferred colours, for decoration

How to Prepare

Step 01

Preheat oven to 175°C. Grease a 23 x 33 cm baking pan and line with parchment paper.

Step 02

In a large bowl, beat together room-temperature butter, powdered sugar, and granulated sugar until light and fluffy.

Step 03

Add eggs one at a time, mixing thoroughly after each addition. Stir in pure vanilla extract.

Step 04

In a separate bowl, whisk together all-purpose flour, salt, and baking powder.

Step 05

Gradually fold the dry ingredients into the butter mixture, mixing just until combined. Do not overmix.

Step 06

Spread batter evenly into the prepared pan. Bake for 18–22 minutes, or until edges are lightly golden. Allow to cool completely in the pan.

Step 07

In a medium bowl, beat butter until smooth. Gradually add powdered sugar, milk, and vanilla extract, mixing until creamy and spreadable.

Step 08

Spread frosting over cooled cookie bars. Add sprinkles before frosting sets. Cut into 24 squares and serve.

Extra Tips

  1. Allow both cookie bars and butter to reach room temperature before preparation for best texture.
  2. Adjust frosting consistency with additional milk for a softer spread or more powdered sugar for thickness.
  3. Store in an airtight container at room temperature for up to three days.

Tools Required

  • Large mixing bowl
  • Medium mixing bowl
  • Electric mixer
  • 23 x 33 cm baking pan
  • Parchment paper
  • Spatula

Allergen Info

Review ingredients carefully for allergens. Reach out to your healthcare provider if you’ve got specific concerns.
  • Contains wheat (gluten), eggs, and dairy.

Nutritional Information (Per Serving)

Remember, this info is purely for reference and isn’t meant to replace dietary guidance.
  • Caloric Value: 220
  • Fat Content: 10 grams
  • Carbohydrate Content: 30 grams
  • Protein Content: 2 grams