Preheat oven to 350°. In a large bowl, beat brown sugar, melted butter, eggs and vanilla until well blended. In another bowl, whisk flour, baking powder and salt; gradually beat into sugar mixture. Stir in baking chips, cranberries, pecans and orange zest.
Spread into a greased 15x10x1-in. baking pan. Bake until a toothpick inserted in center comes out clean, 18-22 minutes. Cool completely in pan on a wire rack.
For frosting, in a large bowl, combine cream cheese, confectioners’ sugar, butter, 1 tablespoon zest and vanilla; beat until smooth. Spread over bars. Combine dried cranberries and remaining 2 tablespoons zest; sprinkle over frosting. Refrigerate at least 2 hours. Cut into triangles. Store in the refrigerator.