Sugar Cookie Bars

Every winter holiday of my childhood had a sugar cookie decorating day. There were years when it was just my mom, my sister, and me sprinkling cookie tops with red and green. At some point my little brother came along and enjoyed dumping bottles of sprinkles over a single cookie. Sometimes a family friend would join in for a few hours, laughing with my mom or helping break up fights between me and my sister. My grandma would usually make an appearance, sipping coffee at the kitchen table an