The Best Sugar Cookie Bars

My roommate Sarah brought these to our annual Christmas cookie exchange freshman year of college. Everyone ignored the elaborate cutout cookies and kept going back for squares of the softest, most buttery bars wed ever tasted. Ive made them for every potluck since.

Last summer I made three batches for my nieces birthday. Her little cousins stood around the kitchen island, watching me press the dough into the pan like it was magic. They were even more excited about the sprinkles.

Ingredients

• Unsalted butter: Use it softened to room temperature so it creams properly with the sugar, creating those air pockets that make the bars tender
• Granulated sugar: Sweetens and helps create that slightly crisp edge while keeping the center soft
• Large egg: Binds everything together and adds structure
• Pure vanilla extract: Dont skimp here, it provides the classic sugar cookie flavor
• All-purpose flour: The base of your cookie bars
• Baking powder: Gives the bars a subtle lift without making them cakey
• Salt: Balances the sweetness and enhances all the flavors
• Butter for frosting: Again, room temperature is key for smooth, spreadable frosting
• Powdered sugar: Sift it first to avoid lumps in your frosting
• Whole milk: Helps achieve the perfect spreading consistency
• Food coloring and sprinkles: Completely optional but make everything more fun

Instructions

Preheat your oven:

Set it to 350°F and line a 9x13-inch pan with parchment paper, letting the paper hang over the edges so you can lift the whole thing out later like a pro.

Cream the butter and sugar:

Beat them together until the mixture looks pale and fluffy, about 2-3 minutes, because this step creates the tender texture.

Add the egg and vanilla:

Mix until everything is thoroughly combined and the mixture looks smooth.

Whisk the dry ingredients:

Combine the flour, baking powder, and salt in a separate bowl so they distribute evenly.

Combine the mixtures:

Gradually add the dry ingredients to the wet, mixing just until you no longer see flour streaks, because overmixing makes tough bars.

Press into the pan:

Use clean hands or the back of a spatula to press the dough evenly into your prepared pan.

Bake until set:

Bake for 18-22 minutes until the edges are barely golden and the center looks set, because they continue cooking as they cool.

Cool completely:

Let the bars cool in the pan on a wire rack, because frosting warm bars is a mess nobody wants.

Make the frosting:

Beat the butter until creamy, then gradually add powdered sugar, milk, vanilla, and salt until smooth and fluffy, adding more milk if its too thick.

Frost and decorate:

Spread the frosting evenly over the cooled bars and immediately add sprinkles so they stick.

Slice and serve:

Use the parchment overhang to lift the bars out of the pan, then cut into 24 squares.

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My sister requested these for her wedding shower instead of a traditional cake. Watching guests realize they were basically eating a giant frosted sugar cookie in bar form was pretty wonderful.

Making Them Ahead

You can bake the bars a day ahead and store them unfrosted in an airtight container. Frost them the morning of your event so they taste freshly made.

Flavor Variations

Swap half the vanilla for almond extract in both the dough and frosting. Or add lemon zest to the dough and a teaspoon of lemon juice to the frosting for something bright and summery.

Storage Tips

These bars stay soft and delicious for three days at room temperature when stored in an airtight container. Place parchment paper between layers if you stack them.

• They also freeze beautifully for up to three months
• Thaw frozen bars on the counter for about an hour
• Frosted bars can be frozen, just wrap them tightly

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Theres something so satisfying about a recipe that never lets you down, no matter the occasion or who youre feeding.

Recipe Questions & Answers

→ Can I make these bars ahead of time?

Absolutely! You can bake the bars up to two days in advance. Store them unfrosted in an airtight container, then frost them the day you plan to serve. For best results, frost within 24 hours of serving.

→ What's the best way to get clean cuts when slicing?

Chill the frosted bars for 30 minutes before slicing. Use a sharp knife and wipe it clean between cuts. For extra precision, you can run the knife under hot water and dry it between slices.

→ Can I freeze these sugar cookie bars?

Yes! Freeze the unfrosted bars wrapped tightly in plastic and foil for up to 3 months. Thaw overnight at room temperature, then frost. You can also freeze frosted bars, though the texture may be slightly affected.

→ Why did my bars turn out hard?

Overbaking is the most common cause. Remove from the oven when edges are lightly golden and the center is set—they'll continue cooking slightly as they cool. Using room temperature ingredients also ensures proper texture.

→ Can I use different frosting flavors?

Definitely! Try almond extract, lemon juice, or peppermint extract instead of vanilla. You can also add cocoa powder for chocolate frosting or strawberry powder for a fruity twist.

→ Do I need to refrigerate these bars?

They're best stored at room temperature in an airtight container for up to 3 days. Refrigeration can make them dry, but if your kitchen is very warm or it's particularly humid, refrigeration may extend their shelf life by a day.