Retailers are having success with single-serve cake slices, and now are trying smaller-sized packs of everything from muffins to doughnut holes. Some, like Harp’s Food Stores, Springdale, Ark., have ...

H-E-B shoppers don’t have to buy a full 8-inch cake to enjoy the chain’s popular red velvet cake with cream cheese frosting. For about $3, they can get it by the slice. The same goes for H-E-B’s ...