In a cast iron or frying pan, heat the oil over medium-high heat. Once it’s hot, add the chopped onion and sauté until it turns a light golden brown. This step provides a lovely sweetness to the dish that melds beautifully with the beef.

Next, add the ground beef to the pan. Brown it gently, breaking it apart with a spoon as it cooks. If there’s any excess oil, drain it off, but return that glorious beefy goodness back to the pan once done.

Stir in the garlic powder, onion powder, and Worcestershire sauce. Make sure to coat the beef evenly with these seasonings to enhance the flavor.

In a small bowl, mix the lager beer with the cornstarch to create a slurry. Pour this delightful beer mixture right into the pan with the beef and stir well.

Let this simmer for about 2-3 minutes, or until the sauce thickens and transforms into a luscious coating. Season with salt and pepper to taste.

Toast the pretzel buns lightly to get them golden and crisp. Spoon the hearty beef mixture onto the bottom halves of the buns, letting all those flavors meld together.

Drizzle the beer cheese sauce over the beef generously. Then, simply cover it with the top halves of the pretzel buns.

Serve immediately and prepare to dive into the deliciously messy goodness!