Several in-store bakeries across the country are adding pretzel rolls to product lines as the rolls have proven popular in restaurants. Sales of all types of dinner rolls increased 5% last year, according to Nielsen Perishables Group. "[S]andwich consumption is growing at breakfast and dinnertime. People are having sandwiches for dinner, and dinner sandwiches tend to be hot. A roll is a much better carrier for hot ingredients," said Harry Balzer, NPD's chief food industry analyst.