It depends... How long has it been since you brewed / bottled? Young, immature beer will have a green apple taste which will improve with age. If it has been a while (>3weeks in bottles), it could be permanent. The 2 lbs of brown sugar may be the culprit depending on the amount of other fermentables you used. The cidery flavor may also be esters that were produced if you fermented at too high a temperature. If you give us more information about your recipe and fermentation schedule, it could help narrow down the cause. Also, use the search function to look up "off flavors in beer" to learn more about potential causes and solutions to off flavors.