Next time, I will make the beef patty as instructed (I added worcestershire sauce and dry onion soup mix too, italicized below), but use the caramelized onion made in my Bodalicious Burger recipe, with a slice of pepper-jack or extra-sharp cheddar cheese to top. I loved the crispy texture of the grilled buttered bun, so definitely don't skip that step!
2 lbs 80/20 Ground Beef
1 tsp salt (I used Garlic Salt)
1/2 tsp freshly ground black pepper
2 Tbsp Worcestershire sauce
1 packet dry Lipton Onion Soup mix
2 Tbsp butter, plus more for the rolls/bun
1 red onion, sliced (not too thick, not too thin)
2 Tbsp brown sugar
1/4 cup Hellmann's mayo
Crumbled blue cheese
1. Place the ground beef into a medium mixing bowl. Add salt, pepper, and a few dashes of Tabasco sauce. (Add the worcestershire sauce and dry onion soup mix.) With your hands, mix the meat and seasoning just until combined- don't handle the meat too much. (We like to "indent" the middle since burgers tend to shrink in when we grill.) Set aside.
2. Heat a medium skillet over low heat. Add in the butter, and let it melt.
3. Dump the red onions into the skillet, and add the brown sugar. Give it a toss to combine the ingredients, and then allow the onions to caramelize over low heat for about 20 minutes, tossing occasionally.
4. While the onions are caramelizing, make the spicy mayo by placing the mayo into a small bowl. Add a few dashes of Tabasco sauce, and stir together. Test for taste.
5. Place a 1/2 Tbsp of butter on each half of the kaiser roll/bun. Lightly grill the rolls so they'll be tough enough to hold the spicy mayo. Let the rolls cool onto a plate until you need them.
6. Form the meat into 2 patties and place on a grill or skillet over medium/medium-low heat. Allow it to cook for 3 minutes, then using a spatula, rotate it 45 degrees, leaving it on the same side.
7. Flip the burger, and cook it for a few minutes, rotating it 45 degrees again to achieve the nice grill marks.
8. Now add a large helping of the caramelized onions over the top of that glorious patty, followed by an equally generous helping of crumbled blue cheese.
9. As it finishes cooking, spread the spicy mayo on the rolls/buns.
10. Top with lettuce.
Source: Pioneer Woman