Heat oven to 350°F. Line 9-inch square pan with foil, extending foil over 2 opposite sides of pan. Spray foil with Crisco® Original No-Stick Cooking Spray.
In large bowl, beat frosting and chocolate hazelnut spread with electric mixer on high speed 2 minutes until fluffy and light in color.
Reserve 1/4 cup of the frosting mixture in small microwavable bowl; set aside. Add eggs and 1/4 teaspoon salt to remaining frosting mixture; beat on high speed 1 minute until well mixed. Stir in flour and chocolate chips. Pour and spread batter into pan. Top with hazelnuts.
Bake 38 to 48 minutes or until center is set and slightly jiggly. Cool completely, about 2 hours.
Microwave reserved frosting mixture on High 15 seconds or until mixture is of drizzling consistency. Drizzle over brownies; let stand 5 minutes. Remove foil; using serrated knife cut into 4 rows by 4 rows.