Ingredients
Method
- Preheat oven to 350F (175C) and lightly grease a 13×9” (33x23cm) baking pan with baking spray or butter. Set aside.
- Combine butter, cream cheese, and granulated sugar in a large bowl and use an electric mixer (or a stand mixer) to beat until creamy and well-combined.
- Add eggs, egg yolk, and vanilla extract and stir until completely combined.
- In a separate bowl, whisk together flour, baking powder, and salt.
- With mixer on low-speed, gradually add flour mixture to the butter mixture until completely combined.
- Spread batter evenly into prepared baking pan and bake on 350F (175C) for 25-30 minutes or until center is set and edges are beginning to turn light golden brown. Allow to cool completely before covering with frosting.
- Combine butter and cream cheese and beat with an electric mixer until completely smooth and creamy.
- With mixer on low-speed, gradually add powdered sugar until completely combined, then stir in cornstarch.
- Add vanilla extract and salt and stir until combined.
- Spread frosting evenly over completely cooled cookie bars and add sprinkles on top if desired. Slice and serve. Note that frosting will crust slightly on top but will not solidify all the way through.
Nutrition
Calories: 278kcalCarbohydrates: 35gProtein: 2gFat: 15gSaturated Fat: 9gPolyunsaturated Fat: 1gMonounsaturated Fat: 4gTrans Fat: 1gCholesterol: 60mgSodium: 139mgPotassium: 31mgFiber: 1gSugar: 25gVitamin A: 476IUCalcium: 20mgIron: 1mg
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