Heat oven to 350ºF. Grease bottom only of spring form pan, 9x3 inches. Stir brownie mix (dry), water, oil, eggs and 1 cup of the white baking chips in medium bowl about 50 strokes with spoon or until well blended. Spread in pan.
Bake 35 to 40 minutes or until toothpick inserted 2 inches from side of pan comes out clean or almost clean. Immediately place chocolates around edge of brownie. Cool completely. Remove side of pan.
Place remaining 1/4 cup white baking chips and the shortening in re-sealable plastic sandwich bag; seal. Microwave on High about 30 seconds or until chips are melted. Knead chips until smooth. Cut small corner from bag. Drizzle melted chips over top of brownie. Cut into wedges.