For white chocolate drizzle, place baking chips and oil in small resealable freezer plastic bag. Microwave on medium (50%) for 1 minute to 1 minute 15 seconds, turning bag over after 25 seconds. Squeeze bag until chips are melted and smooth. Cut small tip off one corner of bag, and drizzle over bars. Let stand until set, about 10 minutes. For bars, cut into 8 rows by 4 rows.