THE Ultimate Burger Sauce from Bon Appetite "The Grilling Book" Cookbook which has some awesome recipes. Every recipe that I've tried so far has been excellent. I highly recommend it for anyone who likes to grill. The Kindle Version is only $10.
The Grilling Book: The Definitive Guide from Bon Appetit: Adam Rapoport: 9781449427528: Amazon.com: Books
Special Sauce
When ketchup meets mayonnaise— and adobo sauce— magic happens. Earn bonus points by bringing a jar of this sauce to the next cookout you attend. If your supermarket doesn’t carry chipotle chiles in adobo, look for them at Latin markets.
1 ⁄ 2 cup mayonnaise
2 Tbsp. ketchup
1 Tbsp. finely grated onion
1 Tbsp. sweet relish or dill pickle relish
2 tsp. adobo sauce from canned chipotle chiles in adobo
1 ⁄ 8 tsp. celery salt
1 ⁄ 8 tsp. kosher salt
Combine all ingredients in a medium bowl. Makes about a cup. Can be made 3 days ahead. Store in refrigerator.