Frosted Bar Cookies,
ACTIVE 30 MIN. - TOTAL 3 HOURS, 55 MIN.
| MAKES 1 12 ⁄ DOZEN |
Prepare Chocolate Sugar Cookie Dough as directed. Preheat oven to 350°F. Lightly grease an 8-inch square baking pan with cooking spray. Line bottom and sides of pan with parchment paper, allowing 2 to 3 inches to extend over 2 sides. Press chilled dough into an even layer in prepared pan. Bake in preheated oven until dry to the touch, about 22 minutes. Cool completely in pan on a wire rack, about 1 hour. Lift baked cookie dough from pan using parchment paper as handles; place on a cutting board. Beat 1⁄4 cup softened,
unsalted butter and 2 oz. softened cream cheese with a heavy-duty electric stand mixer on medium speed until creamy,
1 to 2 minutes. Reduce speed to low, and, with mixer running, gradually add 2 cups powdered sugar, beating until smooth.
Add 1 Tbsp. heavy cream and 1⁄4 tsp. vanilla
extract; beat on medium-high speed until blended, about 20 seconds. Spread frosting on baked cookie dough; cut into 18 triangles. Sprinkle with nonpareils.