Ground Beef Sandwich with Caramelized Onions

ground beef sandwich with caramelized onions on toasted buns

Ground beef sandwiches with caramelized onions cook everything in one skillet. The onions cook down slowly while the beef browns and finishes together.

The onions add sweetness while the beef keeps the sandwich filling.

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1. Heat 1 tbsp olive oil in skillet over medium heat until shimmering. 2. Add 2 large onions, thinly sliced. Cook 20-25 minutes, stirring occasionally, until onions are deep golden brown and caramelized. 3. Remove onions from skillet. Increase heat to medium-high. Add 1 lb ground beef, patted dry, in single layer. Cook 6-8 minutes until browned and no pink remains. Internal temp 160°F, firm texture. Drain fat. 4. Stir caramelized onions back into beef. Cook 1 minute to combine. 5. Toast 4 sandwich buns in skillet or oven. 6. Assemble sandwiches with beef and onion mixture. Finish with 1 tbsp Dijon mustard spread on buns.
  • olive oil

  • onion

  • ground beef

  • sandwich bun

  • Dijon mustard

Ingredients

  • 1 tbsp olive oil
  • 2 large onion, sliced
  • 1 lb ground beef
  • 4 whole sandwich bun
  • 1 tbsp dijon mustard

Instructions

1. Heat 1 tbsp olive oil in skillet over medium heat until shimmering.

2. Add 2 large onions, thinly sliced. Cook 20-25 minutes, stirring occasionally, until onions are deep golden brown and caramelized.

3. Remove onions from skillet. Increase heat to medium-high. Add 1 lb ground beef, patted dry, in single layer. Cook 6-8 minutes until browned and no pink remains. Internal temp 160°F, firm texture. Drain fat.

4. Stir caramelized onions back into beef. Cook 1 minute to combine.

5. Toast 4 sandwich buns in skillet or oven.

6. Assemble sandwiches with beef and onion mixture. Finish with 1 tbsp Dijon mustard spread on buns.

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