PRAIRIE DU SAC Wis. The Culver's Frozen Custard and Butterburger chain has met its previously announced March 1 target for eliminating artificial trans fats from its cooking oils and salad dressings The 350-unit quick-service chain also has unveiled an online nutrition choice calculator that guests may use to check nutritional specifications of menu items. A brochure featuring the calculator is available at the restaurants.The regional chain spent two years switching to a trans-fat ...

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