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Frosted Sugar Cookie Bars Recipe

Frosted Sugar Cookie Bars Recipe

Soft, bakery-style sugar cookie bars topped with fluffy vanilla frosting and sprinkles. Perfect for parties and easy slicing.
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Prep Time: 25 minutes
Cook Time: 20 minutes
Total Time: 45 minutes
Servings: 24

Ingredients
 

Cookie Bars

  • 1 cup unsalted butter, softened
  • 1.33 cup granulated sugar
  • 2 large eggs room temperature
  • 2 tsp vanilla extract
  • 2 tbsp milk
  • 2.75 cup all-purpose flour spooned and leveled
  • 0.75 tsp baking powder
  • 0.25 tsp baking soda
  • 0.5 tsp fine salt

Vanilla Frosting

  • 0.75 cup unsalted butter, softened
  • 3 cup powdered sugar sift if lumpy
  • 1.25 tsp vanilla extract
  • 3 tbsp heavy cream or milk more as needed for spreading
  • 0.13 tsp fine salt a pinch
  • 0.25 cup rainbow sprinkles for topping

Instructions

Preparation Steps

  • Heat oven to 350°F. Line a 9x13-inch pan with parchment and lightly grease.
  • Whisk flour, baking powder, baking soda, and salt in a bowl; set aside.
  • Cream butter and sugar until pale and fluffy, about 2 to 3 minutes.
  • Beat in eggs one at a time. Mix in vanilla and milk until smooth.
  • Add dry ingredients on low speed just until combined. Do not overmix.
  • Spread batter evenly in pan. Smooth the top with an offset spatula.
  • Bake 18 to 22 minutes, until edges are lightly golden and center is set.
  • Cool completely in the pan on a rack before frosting.
  • Beat frosting butter until creamy. Gradually add powdered sugar, vanilla, and salt.
  • Stream in cream until fluffy and spreadable, 2 to 3 minutes. Tint if desired.
  • Spread frosting over cooled bars. Add sprinkles. Chill 10 minutes, then slice.

Notes

For almond bakery flavor, add 1/4 tsp almond extract to the frosting. Prefer thicker bars? Bake in a 9-inch square pan and extend bake time 5–8 minutes. Store covered at room temperature 2 days or refrigerate up to 5 days; freeze cut bars (unfrosted or frosted) up to 2 months.
This recipe is an original creation inspired by classic Frosted Sugar Cookie Bars Recipe flavors. All ingredient ratios and instructions are independently developed.