Preheat oven to 350ºF. Prepare Skillet pan with vegetable cooking spray.
In medium bowl, combine flour and salt. In large bowl, beat butter and sugar with electric mixer until light and fluffy. Add egg white and vanilla; mix well. Add flour mixture to butter mixture; mix well. Stir in chips. Press dough into prepared pan, filling 3/4 full.
Bake 22-25 minutes or until edges are golden brown. Cool slightly. Top with ice cream, hot fudge and sprinkles.