Conagra Foods Has Issued A Nationwide Allergy Alert on a Limited Number of 15 oz. Tubs of Blue Bonnet Light Spread. A limited number of 15 oz. tubs of Blue Bonnet Spread were inadvertently mispackaged with the wrong lid printed for regular Blue Bonnet Spread when the tub portion describes the product as Blue Bonnet Light Spread. The product inside of the tub is regular Blue Bonnet Spread. As a result, the product tubs do not declare the allergen whey (milk), as an ingredient. People who have an allergy or severe sensitivity to milk run the risk of a serious or life-threatening allergic reaction if they consume this product.