Frosted Sugar Cookie Bars

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Total Time 55 minutes
Servings 18 squares

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These sugar cookie bars are soft and tender with a thick layer of creamy frosting on top. The recipe is much simpler than making traditional sugar cookies and made in a 9×13 inch pan – so it makes a big batch!

Stack of three sugar cookie bars decorated with pink frosting

**This post was update March 4, 2025 with new photos and an updated recipe so that the bars are made in a 9×13 inch pan**

If you love sugar cookies – especially the soft, melt-in-your mouth variety with a thick layer of frosting on top – then I urge you to make these easy sugar cookie bars. They’re perfect if you love Lofthouse cookies and can be decorated for any occasion.

Most of the time, I can’t be bothered to make a batch of cut-out sugar cookies. The process of making the dough, chilling it, rolling it out, cutting it into tiny little shapes, and painstakingly decorating each cookie is easily an all day affair.

But with these sugar cookie bars, there’s no need to chill the dough and get flour all over your kitchen when you roll out the dough, and no decorating skills required. Instead, you get super soft cookie bars with a delicious buttery vanilla flavor and creamy frosting on top.

They’re flavorful, tender and perfect for birthdays and holidays.

Frosted sugar cookie bars on plate with glass of milk

Making the dough for these cookie bars is very similar to making sugar cookies. However, the ratios are slightly different. That’s because with cut-out cookies, you need the cookies to hold their shape as they bake. With these cookie bars however, we want them to stay soft and tender.

  1. Start by preheating the oven to 350F (180C). You can either lightly grease the pan, or lightly grease the pan and line with baking paper so that there’s an overhang around the edges.
    • Greasing the pan first, then lining with parchment makes the parchment stick to the pan. It’s therefore easier to spread the dough into the pan without the parchment sliding around.
  2. In a medium bowl, start by sifting together the dry ingredients: flour, cornstarch, baking powder and salt.
    • The cornstarch (AKA cornflour for readers in the UK) keeps these bars tender and a little delicate.
    • Just a little baking powder ensures that they aren’t dense and gooey like a blondie.
  3. Then in a separate large bowl you’ll beat together the butter and sugar until creamed.
    • The butter should be softened, but still slightly cold to the touch. If the butter is starting to melt, the texture will be more similar to a blondie.
Bowl of dry ingredients whisked together and bowl of butter and sugar
  1. Beat the eggs, additional egg yolk, vanilla and almond extract into your dough.
    • The additional egg yolk keeps the bars tender.
    • While these bars are delicious without it – the addition of almond extract really takes the flavor up a notch. You can find almond extract near the vanilla extract in the baking section of your grocery store.
  2. Carefully mix the dry ingredients into the butter mixture. The dough should be a little sticky. Be careful not to overmix or the bars can become tough.
Bowl of butter and sugar mixed together with eggs and vanilla added, and bowl of butter mixture with dry ingredients added
  1. Dump the dough into the prepared pan and smooth into an even layer.
Pan of sugar cookie dough and pan of sugar cookie dough spread into an even layer
  1. The bars will bake for about 25-30 minutes. When done baking, cool the bars in the pan.

After the bars are baked and cooled, they’re topped with a thick layer of creamy vanilla buttercream. I actually added just a touch of cream cheese to the recipe to help cut the sweetness. The frosting is definitely still sweet – but not sickeningly so. Just like the cookie dough, I recommend adding a little almond extract for the perfect flavor.

Stand mixer beater covered with pink sugar cookie frosting

After frosting the bars, I always place them in the fridge for about 20 minutes (or more) before slicing. This makes the frosting harden slightly to give you cleaner cuts.

If you simply greased the pan, you’ll cut the bars in the pan. However, if you lined the pan you can lift the bars out of the pan using the overhang, holding from the long sides and carefully transfer to a cutting board. I like to frost the bars with an offset spatula but any spatula or non-serrated knife will work.

pan of sugar cookie bars topped with pink frosting and sprinkles

Recipe Tip

When cutting the bars, use a thin, sharp knife. For clean cuts, do not use a sawing motion (back and forth motion). Wipe off the knife in between cuts.

Three frosted sugar cookie bars, one on top of each other

You’ll love these sugar cookie bars because of they’re tender texture, buttery vanilla flavor, and creamy frosting. So much simpler than making cut-out cookies, these sugar cookie bars are perfect for any holiday.

And for more cookie bar recipes, be sure to try:

Stack of three sugar cookie bars, stacked on top of each other
5 from 2 votes
These sugar cookie bars are soft and tender with a thick layer of creamy frosting on top. The recipe is much simpler than making traditional sugar cookies and made in a 9×13 inch pan – so it makes a big batch!
Prep: 30 minutes
Cook: 25 minutes
Total: 55 minutes
Servings: 18 squares
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Equipment

  • 9×13 inch (23 x 33 cm) baking pan*

Ingredients

Sugar Cookie Bars

  • 2 3/4 cup all-purpose flour (344 grams), spooned and leveled
  • 3 tablespoons corn starch (about 24 grams)
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 1 cup unsalted butter (226 grams), softened but not starting to melt
  • 1 1/2 cups granulated sugar (300 grams)
  • 2 large eggs
  • 1 large egg yolk, discard the white, in addition to the 2 large whole eggs
  • 2 teaspoon vanilla extract
  • 1/2 teaspoon almond extract

For the Frosting

  • 3/4 cup unsalted butter (168 grams), softened to room temperature
  • 2 ounces full-fat cream cheese (56 grams), softened to room temperature, or replace with another 1/4 cup butter
  • 3-4 cups powdered sugar (330-440 grams), sifted
  • 1 teaspoon vanilla
  • 1/4 teaspoon almond extract
  • 1 to 2 tablespoons whipping cream, or milk
  • 2-4 drops food coloring, optional
  • sprinkles

Instructions 

Sugar Cookie Bars

  • Preheat the oven to 350F (180C) degrees. Lightly grease a 9×13 (23×33 cm) pan and line with parchment paper so that there's an overhang around the edges (greasing first keeps the paper in place). Alternatively, lightly grease the pan.
  • In a medium bowl whisk together the flour, cornstarch, baking powder, and salt. Set aside
  • In a separate large bowl, beat together the butter and sugar until creamed together.
  • Beat in the 2 eggs, additional egg yolk, vanilla extract and almond extract.
  • Mix the flour mixture into the butter mixture, starting with the mixer on a low speed and gradually increasing to medium speed until combined.
  • Add the batter to your prepared pan and smooth into an even layer using an offset spatula or the back of a spoon.
  • Bake in the middle of the preheated oven for 25-30 minutes or until the top is set and the sides are just beginning to pull away from the edges of the pan. Bake time is slightly dependent on how chewy vs cakey you prefer your cookie bars. Baking for longer will make them a little more cakey in texture. Allow to cool fully before frosting. 

Buttercream Frosting

  • In a medium bowl, beat the butter until smooth. Then mix in the cream cheese. I recommend cutting the cream cheese into cubes first for easier mixing.
  • Add in 2 cups powdered sugar along with the vanilla extract, almond extract, salt and optional food coloring. Beat together, starting with the mixer on a low speed.
  • Mix in the rest of the powdered sugar about 1/2-1 cup at a time, adding in the cream 1 tablespoon at a time as needed until the desired sweetness and thickness is reached.

Decorating

  • Frost the fully cooled bars with an offset spatula or knife. Optionally, decorate with sprinkles.
  • Place in the fridge for at least 20 minutes before slicing for the frosting to slightly harden (this will give you cleaner cuts).
  • When ready to slice, if you lined the pan with parchment, lift the bars out of the pan (using the overhang from the long sides) and place on a cutting board. Slice with a sharp knife. If you only greased the pan, then slice the bars in the pan.

Notes

  1. For a Small Batch: Make the bars in an 8×8 inch (20×20 cm) pan. Divide all the ingredients in half – not the small changes due to the extra egg yolk. The bars will take about 20-25 minutes to bake.
    • 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
  2. Storage: Store in an airtight container at room temperature for up to 3 days or in the fridge for up to 5 days. Fresh is always best.
  3. Nutrition: Nutrition is an estimate only and based on 1 bar with frosting, assuming the pan is sliced into 18 uniform pieces and all the frosting is used. 

Nutrition

Calories: 404kcal, Carbohydrates: 53g, Protein: 3g, Fat: 20g, Saturated Fat: 12g, Polyunsaturated Fat: 1g, Monounsaturated Fat: 5g, Trans Fat: 1g, Cholesterol: 82mg, Sodium: 87mg, Potassium: 64mg, Fiber: 1g, Sugar: 37g, Vitamin A: 650IU, Vitamin C: 0.01mg, Calcium: 26mg, Iron: 1mg
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5 Comments

  1. 5 stars
    Fiona-

    Another winner! These were incredible. I served them to a ladies club today, along with the oatmeal peanut butter cookies and the ladies were blown away. Your recipes are amazing and I canโ€™t wait to try more of them.