Preheat oven & prep pan: Preheat to 375°F (190°C) and grease a 12-cup muffin pan.
Make the meatloaf mixture: In a large bowl, combine ground beef, egg, breadcrumbs, brown sugar, Worcestershire, garlic powder, minced onion, ½ packet ranch mix, and ½ packet au jus mix until well blended.
Fill muffin pan: Divide mixture evenly among the muffin cups, pressing lightly to shape.
Prepare sauce: In a separate bowl, whisk together remaining ranch and au jus mixes, melted butter, brown sugar, and water until smooth.
Top muffins: Spoon sauce over each portion and place banana pepper rings on top.
Bake: Bake uncovered for 25 minutes, until cooked through and glazed on top.
Rest & serve: Let rest 5 minutes before removing from pan and serving.