Caramelized Onion Grilled Cheese (Print Version)

Golden-brown sourdough filled with sweet caramelized onions and sharp cheddar cheese. Pure comfort in every bite.

# What You'll Need:

→ Bread & Dairy

01 - 4 slices sourdough or country bread
02 - 2 tablespoons unsalted butter, softened
03 - 4 ounces sharp white cheddar cheese, grated

→ Onions

04 - 2 large yellow onions, thinly sliced
05 - 1 tablespoon olive oil
06 - 1/2 teaspoon salt
07 - 1/2 teaspoon sugar, optional

→ Seasonings

08 - Freshly ground black pepper to taste

# How to Prepare:

01 - Heat olive oil in a large skillet over medium heat. Add sliced onions and salt, stirring to coat evenly. Cook, stirring occasionally, for 20 to 25 minutes until deeply golden and caramelized. Add sugar halfway through if desired to enhance sweetness and browning.
02 - Remove onions from heat and set aside. Wipe out skillet if needed.
03 - Butter one side of each bread slice. Place two slices, buttered side down, on a clean surface.
04 - Top each bread slice with half the grated cheddar, then pile caramelized onions evenly over the cheese. Sprinkle with black pepper. Cover with remaining bread slices, buttered side up.
05 - Heat skillet over medium-low heat. Place sandwiches in skillet and cook 3 to 4 minutes per side, pressing gently, until bread is crisp and golden and cheese is completely melted. Adjust heat as needed to prevent burning.
06 - Remove from pan and let rest for 2 minutes. Slice diagonally and serve hot.

# Expert Advice:

01 -
  • The onions cook down into a jammy, almost sweet filling that makes every bite feel indulgent without any fuss.
  • Sharp cheddar melts into every crevice, balancing the sweetness with a satisfying tang.
  • It's the kind of sandwich that works for a quick lunch or a cozy dinner when you want comfort without complications.
02 -
  • Don't rush the onions on high heat or they'll burn before they sweeten, low and slow is the only way to get that deep caramelized flavor.
  • Press gently on the sandwich while it grills to help the cheese melt evenly, but don't smash it flat or you'll squeeze out all the onions.
  • Let the sandwich rest for a minute or two before cutting so the cheese doesn't all ooze out onto the plate.
03 -
  • Use a heavy skillet or cast iron pan for even heat and the best golden crust on your bread.
  • Grate your own cheese instead of buying pre-shredded, it melts so much smoother and tastes fresher.
  • If your bread is browning too fast, lower the heat and cover the pan for a minute to help the cheese melt without burning the outside.
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