If you want to decorate with drizzled chocolate melt 1/2 cup white chocolate chips a in a microwave-safe glass or ceramic bowl in 30-second intervals, stirring after each melting, for 1 to 3 minutes (depending on your microwave). Do not overheat or chocolate will scorch. Place the melted chocolate in a small plastic bag. Snip the end of the bag and drizzle over the frozen chocolate covered banana. Return the bananas to the freezer until the chocolate is firm.