Made with real mayonnaise and relish. Gluten free. Quality since 1927. Blue Plate: Since 1927, Blue Plate mayonnaise has been perking up the flavor of all your favorite foods. Blue Plate real mayonnaise is blended with sweet relish to add tang and sweetness to your sandwiches, salads, deviled eggs and other recipes. Satisfaction guaranteed. Please include best by date when contacting us. blueplatemayo.com. SmartLabel. For information visit us at blueplatemayo.com.