Peanut butter may be the most popular in the United ... it up when choosing your nut butter,” adds Meshulam. No matter which nut butter you reach for, reading the label is paramount.

The post reads: "My entire five pack of Reese's had no peanut butter in it." It features a photo of five Reese's Peanut Butter cups, each with bite marks, none with the peanut butter filling.