Fat Daddy's in Southlake.
They're not kidding when they say fat daddy's. The hamburgers are huge and anyone who eats these on a regular basis will get fat. But it is a great guilty pleasure. Prices are good. French fries are sprinkled with salt and pepper and are yummy! I had a regular fat daddy with cheddar cheese and avocado...so good! My hubby had the 1.5 lb hamburger with bacon. Crazy big but so good he ate it all. They have a topping bar so you can make it exactly like you like it. They also serve beer and milkshakes. Oh, and free soft serve ice cream for the kids and adults. You should go!