For Toasted Buns: You’ll need about 2 tsp of softened butter for six hamburger buns.

Brown the ground beef in a large skillet, drain the grease and set aside the meat. Don’t skip this part, draining the meat is crucial to stopping your filling from getting greasy.

In the same skillet, melt 2 tablespoons of butter and saute the onions over medium high heat until caramelized.

Stir in the remaining ingredients and bring to a boil. Reduce heat and simmer for 5 – 7 minutes. The sauce will thicken.

Add the ground beef to the sauce in the skillet and stir until cooked through.

To serve, butter the insides of your hamburger buns and toast them lightly on a griddle pan. Add the filling to your hamburger buns & enjoy. You can even top it with cheese.