To make the Big Mac Sauce - combine mayonnaise, ketchup, pickle relish, mustard, onion powder, and vinegar in a bowl. Stir to combine and set aside.
Heat a Blackstone Griddle or any type of griddle to medium high heat.
Shape the ground beef into 6 round even size balls. Then evenly distribute on a griddle. Use a burger smasher to flatten the ground beef.
After 2 to 4 minutes of cooking on one side, place a small tortilla on top. Then flip them over and let the ground beef continue cooking.
Add a slice of cheese to the top and let the cheese melt on top of the burger.
Stick them on a taco tray holder and add a slice of cheese, shredded lettuce, ground beef, Big Mac sauce and pickles.