Frosted Sugar Cookie Bars – Soft, Chewy Cookie Bars with Creamy Frosting

Frosted Sugar Cookie Bars are soft, tender, and buttery with a thick layer of creamy frosting spread over the top. They have all the sweet vanilla and almond flavor of classic sugar cookies but are much easier to prepare because everything bakes together in one 9×13-inch pan.
Instead of rolling individual cookies and cutting out shapes, you simply prepare the dough, spread it into the pan, and bake. Once cooled, add the fluffy buttercream frosting and finish with sprinkles for a colorful homemade dessert.
These sugar cookie bars make 18 squares, making them a convenient choice for holiday celebrations, birthday parties, potlucks, and family gatherings. The combination of a soft cookie base and rich frosting makes every square a delicious treat.

Why You’ll Love These Frosted Sugar Cookie Bars

• Easier than traditional sugar cookies: There is no need to roll out individual cookies or cut shapes. The dough bakes in one pan, saving preparation time.
• Soft and tender texture: Cornstarch, butter, and the combination of whole eggs and an additional egg yolk help create a tender cookie base.
• Thick, creamy frosting: The buttercream frosting includes butter, cream cheese, vanilla, and almond extract for a rich topping.
• Perfect for sharing: A 9×13-inch pan makes 18 squares, making these bars great for parties and holiday dessert tables.
• Easy to decorate: Add colorful sprinkles to make the bars festive for different occasions.
• Make-ahead friendly: You can prepare them in advance and store them in an airtight container.

Frosted Sugar Cookie Bars Ingredients

These sugar cookie bars use everyday baking ingredients divided into two parts: the cookie base and the frosting.

For the Sugar Cookie Bars

• All-purpose flour: Provides structure and gives the cookie bars their soft, tender base. Spoon and level the flour when measuring.
• Cornstarch: Helps create a more tender texture.
• Baking powder: Gives the cookie base a little lift as it bakes.
• Salt: Balances the sweetness and enhances the other flavors.
• Unsalted butter: Creates a rich, buttery flavor. It should be softened but not beginning to melt.
• Granulated sugar: Sweetens the cookie bars and combines with the butter to create the base.
• Large eggs and an extra egg yolk: The additional yolk contributes richness to the cookie dough.
• Vanilla extract: Adds classic sugar cookie flavor.
• Almond extract: Provides a subtle almond flavor that complements the vanilla.

For the Frosting

• Unsalted butter: Creates the creamy, rich foundation of the frosting.
• Full-fat cream cheese: Adds a slight tang and creamy texture. You can replace it with another 1/4 cup of butter if preferred.
• Powdered sugar: Sweetens and thickens the frosting. Sift it before adding to help create a smooth consistency.
• Vanilla: Adds flavor to the buttercream.
• Almond extract: Complements the almond flavor in the cookie base.
• Whipping cream or milk: Helps adjust the frosting’s consistency.
• Food coloring: Optional for adding a festive color.
• Sprinkles: An easy finishing touch that makes the bars look more celebratory.

Helpful Tips for Making Sugar Cookie Bars

A few simple details can help you get the right texture in both the cookie base and frosting.

• Measure the flour correctly: Spoon the flour into your measuring cup and level it rather than scooping directly from the bag.
• Use softened butter: The butter should be soft enough to beat smoothly but not melted or starting to melt.
• Don’t skip the extra egg yolk: The recipe uses two whole eggs plus one additional yolk, which contributes to the richness of the cookie bars.
• Prepare the pan with parchment: Grease the pan first so the parchment stays in place, then leave an overhang along the edges to make lifting out the cooled bars easier.
• Mix the flour on low speed initially: Start slowly when adding the dry ingredients to the butter mixture to avoid flour scattering.
• Watch the baking time: The bars are ready when the top is set and the sides are just beginning to pull away from the pan.
• Adjust the frosting gradually: Add the powdered sugar in portions and the cream one tablespoon at a time until you reach your preferred thickness and sweetness.
• Cool completely before frosting: Adding frosting to warm cookie bars can affect its consistency.

How to Make Frosted Sugar Cookie Bars

These homemade sugar cookie bars come together in three main stages: preparing the cookie base, making the frosting, and decorating.

Step 1: Prepare the Baking Pan

Preheat the oven to 350°F (180°C).
Lightly grease a 9×13-inch (23×33 cm) baking pan and line it with parchment paper, leaving an overhang along the edges. Greasing the pan first helps keep the parchment in place.
You can also simply grease the pan without using parchment.

Step 2: Combine the Dry Ingredients

In a medium bowl, whisk together the all-purpose flour, cornstarch, baking powder, and salt.
Set the mixture aside while you prepare the wet ingredients.

Step 3: Cream the Butter and Sugar

In a separate large bowl, beat the softened unsalted butter and granulated sugar until creamed together.
The mixture should be evenly combined before adding the eggs.

Step 4: Add the Eggs and Extracts

Beat in the two large eggs and the additional egg yolk.
Add the vanilla extract and almond extract, mixing until incorporated.

Step 5: Mix in the Dry Ingredients

Add the flour mixture to the butter mixture.
Start mixing on low speed and gradually increase to medium speed until the ingredients are combined.

Step 6: Spread the Dough into the Pan

Transfer the cookie dough to the prepared baking pan.
Use an offset spatula or the back of a spoon to spread it into an even layer.

Step 7: Bake the Sugar Cookie Bars

Bake in the middle of the preheated oven at 350°F (180°C) for 25–30 minutes.
The top should be set, and the sides should just begin pulling away from the edges of the pan.
The exact baking time depends on whether you prefer a chewier or slightly more cakey texture. Baking longer produces a more cakey result.
Allow the cookie bars to cool completely before frosting.

Step 8: Make the Buttercream Frosting

In a medium bowl, beat the softened butter until smooth.
Add the softened cream cheese and mix until incorporated. Cutting the cream cheese into cubes beforehand can make mixing easier.
Add 2 cups of sifted powdered sugar, vanilla extract, almond extract, salt, and optional food coloring.
Begin beating on low speed.
Gradually mix in the remaining powdered sugar, adding about 1/2–1 cup at a time. Add whipping cream or milk one tablespoon at a time as needed until the frosting reaches your desired sweetness and thickness.

Step 9: Frost and Decorate

Once the cookie bars have cooled completely, spread the frosting evenly over the top using an offset spatula or knife.
Add sprinkles if desired.
Place the frosted bars in the refrigerator for at least 20 minutes before slicing. This allows the frosting to harden slightly and makes cleaner cuts easier.

Step 10: Slice and Serve

If you used parchment paper, lift the bars out of the pan using the overhanging edges and transfer them to a cutting board.
Use a sharp knife to cut into 18 squares.
If you only greased the pan, slice the bars directly in the pan.

Small-Batch Frosted Sugar Cookie Bars

If you don’t need a full 9×13-inch batch, you can make a smaller version in an 8×8-inch (20×20 cm) pan.
The original recipe’s small-batch measurements are:

• 1 1/4 cup plus 2 tablespoons all-purpose flour
• 1 1/2 tablespoons cornstarch
• 1/2 teaspoon baking powder
• 1/4 teaspoon salt
• 1/2 cup unsalted butter
• 3/4 cup granulated sugar
• 1 large egg
• 1 large egg yolk
• 1 teaspoon vanilla extract
• 1/4 teaspoon almond extract
  Divide the remaining ingredients in half as directed by the recipe. The smaller cookie bars take approximately 20–25 minutes to bake.

Frequently Asked Questions

Why are my sugar cookie bars too cakey?

The baking time affects the final texture. Baking the bars for longer makes them slightly more cakey, while baking for less time produces a chewier texture. Watch for a set top and sides just beginning to pull away from the pan.

Can I make Frosted Sugar Cookie Bars without cream cheese?

Yes. The recipe notes that you can replace the 2 ounces of full-fat cream cheese with another 1/4 cup of butter.

Can I use milk instead of whipping cream in the frosting?

Yes. Milk can be used instead of whipping cream. Add it gradually, one tablespoon at a time, until the frosting reaches the desired thickness.

Why should I chill the bars before slicing?

Refrigerating the frosted bars for at least 20 minutes allows the frosting to harden slightly. This helps you cut cleaner squares without disturbing the frosting too much.

Can I make these sugar cookie bars in a smaller pan?

Yes. Use an 8×8-inch pan and divide the ingredients in half according to the small-batch measurements. The smaller batch takes approximately 20–25 minutes to bake.

Storage and Make-Ahead Tips

These frosted sugar cookie bars can be prepared ahead of time, making them convenient for parties and holiday baking.
Room-temperature storage: Store the bars in an airtight container at room temperature for up to 3 days.
Refrigerator storage: You can also store them in an airtight container in the refrigerator for up to 5 days.
For the best texture: The recipe notes that the bars are always best when fresh, so enjoy them within the recommended storage period.

Final Thoughts

Frosted Sugar Cookie Bars are a delicious alternative to traditional cut-out sugar cookies. Their soft, tender base, thick creamy frosting, and colorful sprinkles make them perfect for sharing. With a simple 9×13-inch pan preparation and 18 generous squares, this recipe is a wonderful choice for your next holiday celebration or family gathering.

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