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Wendy’s trying bread experiment

NEW YORK — In its latest push to establish itself as a purveyor of premium burgers, Wendy’s is testing a pretzel bun.

The Dublin, Ohio-based chain has started selling a bacon cheeseburger in select locations made with a slightly heartier, pretzel-like bun. A spokesman for Wendy’s declined to confirm the tests or provide any details, such as its price or where it’s being sold. But the ‘‘Pretzel Bacon Cheeseburger’’ was being advertised at a Wendy’s in Miami with others posting pictures and talking about it on Twitter.

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Wendy’s executives have already said they plan to use better breads in the year ahead as a relatively low-cost way to raise perceptions about the quality of its food. The reliance on bread comes amid rising costs for beef, which have pressured restaurant chains that are struggling to keep prices down to hold on to price-conscious diners.

The focus on bread is part of Wendy’s ongoing push to position itself on the higher end of the fast-food pecking order in terms of quality.

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