Easy Sugar Cookie Bars Recipe With Buttercream Frosting

Baking a batch of classic sugar cookies often requires rolling dough, cutting shapes, and waiting for multiple pans to cycle through the oven. This sugar cookie bars recipe eliminates the tedious rolling process by pressing the entire batch into a single pan, delivering that nostalgic, buttery flavor and tender chew in a fraction of the time.

Sugar cookie bars are a convenient, crowd-pleasing dessert that combines the rich flavor of traditional holiday cookies with the simplicity of sheet pan baking. When I first tested this recipe, I noticed that reducing the mixing time slightly and pressing the dough evenly into a rimmed baking sheet completely eliminated dry edges, resulting in uniformly soft, pillowy bars from corner to corner.

Why This Works: Creaming softened unsalted butter with granulated sugar incorporates tiny air pockets that expand during baking, providing a soft lift. Meanwhile, a slightly higher ratio of flour to moisture prevents the bars from spreading too thin, ensuring a thick, satisfying bite beneath a layer of creamy homemade buttercream.

Ingredients & Scaling Guide

To ensure success, use room-temperature dairy products and measure your flour accurately using the spoon-and-level method.

For the Cookie Bars:

• 1 cup (2 sticks) unsalted butter, softened to room temperature
• 1 ½ cups granulated white sugar
• 2 large eggs, room temperature
• 2 teaspoons pure vanilla extract
• 3 cups all-purpose flour
• 2 teaspoons baking powder
• ½ teaspoon salt

For the Vanilla Buttercream Frosting:

• ½ cup (1 stick) unsalted butter, softened
• 3 cups powdered sugar
• 3-4 tablespoons heavy cream or whole milk
• 1 teaspoon pure vanilla extract
• Optional: Food coloring and sprinkles

Step-by-Step Instructions

1. Prep the Oven and Pan: Preheat your oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper, leaving an overhang on the sides for easy removal later. Lightly grease the parchment with non-stick spray.
2. Cream Butter and Sugar: In a large mixing bowl or stand mixer fitted with the paddle attachment, beat the softened butter and granulated sugar together on medium speed for 2 to 3 minutes until light and fluffy.
3. Add Wet Ingredients: Mix in the eggs one at a time, ensuring the first is fully incorporated before adding the second. Stir in the vanilla extract. Scrape down the sides of the bowl as needed.
4. Combine Dry Ingredients: In a separate medium bowl, whisk together the all-purpose flour, baking powder, and salt. Gradually add these dry ingredients to the butter mixture on low speed just until combined. Do not overmix, or the bars will lose their tender texture.
5. Press the Dough: The dough will be thick. Transfer it into your prepared 9×13-inch pan. Use your hands lightly dusted with flour or a small offset spatula to press the dough into an even, flat layer.
6. Bake: Bake for 18 to 22 minutes. The edges should be set and lightly golden, but the center should still look pale and soft. Avoid overbaking, or the bars will dry out.
7. Cool Completely: Remove from the oven and let the pan cool completely on a wire rack before frosting.
8. Make the Frosting: While the bars cool, beat the softened butter for the frosting until smooth. Gradually add powdered sugar, heavy cream, and vanilla extract. Beat on medium-high speed for 2 minutes until light and spreadable.
9. Frost and Decorate: Spread the buttercream evenly over the cooled cookie bars. Top with sprinkles if desired, slice into squares, and serve.

Chef’s Notes & Flavor Variations

Sugar cookie bars serve as a versatile blank canvas for any celebration. Here are a few ways to customize your batch:

• Citrus Zest: Add the freshly grated zest of one lemon or orange into the wet ingredients for a bright, aromatic punch.
• Funfetti Style: Fold ½ cup of rainbow sprinkles directly into the cookie dough before pressing it into the pan.
• Almond Extract: Substitute half of the vanilla extract with almond extract for a classic bakery-style flavor profile.

Storage, Freezing & Reheating

Proper storage ensures your sugar cookie bars retain their soft, cake-like texture for days.

• At Room Temperature: Store frosted or unfrosted bars in an airtight container at room temperature for up to 3 days. Place a sheet of parchment paper between layers if stacking.
• Refrigeration: If your kitchen is warm or you are using a dairy-heavy frosting, store the bars in the refrigerator for up to 7 days. Bring them to room temperature for 15 minutes before serving for the best texture.
• Freezing: Unfrosted bars can be wrapped tightly in plastic wrap and aluminum foil, then frozen for up to 2 months. Thaw overnight in the refrigerator before frosting and serving.

Frequently Asked Questions

Can I use a store-bought sugar cookie mix?

Yes. If you are short on time, you can press two packages of dry sugar cookie mix into a greased 9×13-inch pan, adjusting the added butter and egg amounts according to the package instructions for bar cookies.

Why did my cookie bars turn out hard?

Hard bars are usually the result of over-baking or adding too much flour. Always measure flour by spooning it into the measuring cup and leveling it off with a knife, and pull the pan from the oven as soon as the center looks set.

Can I make these bars ahead of time?

Absolutely. You can bake the bars a day in advance, keep them tightly covered at room temperature, and apply the fresh buttercream frosting just a few hours before serving.