The Burger Lab
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[Photographs: J. Kenji Lopez-Alt]

About the author: J. Kenji Lopez-Alt is the Chief Creative Officer of Serious Eats where he likes to explore the science of home cooking in his weekly column The Food Lab. You can follow him at @thefoodlab on Twitter, or at The Food Lab on Facebook.

About This Recipe

Ingredients

  • 1/4 teaspoon canola oil
  • 5 ounces freshly ground beef, divided into two 2 1/2-ounce balls
  • Kosher salt and freshly ground black pepper
  • 1 medium onion, thinly sliced (about 1 cup sliced onions)
  • 2 slices American cheese
  • 2 soft hamburger buns
  • Mustard, pickles, and other condiments, if desired