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overhead view of dessert bars with sugar cookie base and buttercream frosting on top with bowl of sprinkles

Sugar Cookie Bars

The BEST sugar cookie bars with a thick, soft (never dry!) sugar cookie base topped with super fluffy, rich buttercream frosting. No chilling, no rolling, better even than a classic sugar cookie. Try them chilled straight from the fridge to take these to the next level!
Course Dessert
Cuisine American
Prep Time 15 minutes
Cook Time 18 minutes
Total Time 33 minutes
Servings 16 bars
Calories 272kcal
Author Tiffany


  • 1 ½ sticks butter 12 tablespoons or 3/4 cup
  • 1 ½ cups sugar
  • 3 eggs
  • 2 teaspoons vanilla extract
  • 3 cups flour
  • 1 teaspoon baking powder
  • 1 teaspoon baking soda
  • 1 teaspoon salt
  • 2 teaspoons corn starch

For the Frosting

  • 1 cup butter at room temperature
  • 3 cups powdered sugar
  • 1 teaspoon vanilla extract
  • 4-8 tablespoons milk as needed
  • pinch of salt
  • 1-2 drops food coloring
  • sprinkles optional


  • Preheat oven to 350 degrees. Line a 9x13 inch pan with parchment or foil.
  • In a large bowl, cream butter and sugar for 2 minutes til very fluffy.
  • Mix in eggs and vanilla.
  • In a medium bowl whisk together flour, baking powder, baking soda, salt, and corn starch.
  • Add dry ingredients to wet ingredients and mix until completely incorporated. (Batter will be very thick!)
  • Use a rubber spatula or spoon to spread/press dough into prepared pan in an even layer. (The batter is very thick so this will take a minute but trust me, these are worth a little elbow grease!)
  • Bake in preheated oven for about 18 minutes. Allow to cool completely in the pan.

Prepare the Frosting

  • In a large bowl cream butter for 2-3 minutes until very fluffy. Mix in powdered sugar, vanilla extract, and 2 tablespoons of milk. Mix in an additional tablespoon of milk at a time - creaming thoroughly after each addition - until frosting is very fluffy. Stir in 1-2 drops of food coloring if desired.
  • Frost cooled bars and add sprinkles if desired. Cut into squares and serve OR store in airtight container at room temperature up to three days OR store in the fridge for 5 days (try them chilled, it's AMAZING.).


Pro tip: These are incredible at room temperature - and somehow even better chilled, straight from the fridge! Try it, I promise you'll love it. 
Pro tip: add 1/2 teaspoon almond extract to the batter, and 1/4-1/2 teaspoon almond extract to the frosting for a fun flavor twist (this is my favorite!). 


Calories: 272kcal | Carbohydrates: 60g | Protein: 4g | Fat: 2g | Saturated Fat: 1g | Trans Fat: 1g | Cholesterol: 33mg | Sodium: 271mg | Potassium: 64mg | Fiber: 1g | Sugar: 42g | Vitamin A: 76IU | Calcium: 45mg | Iron: 1mg