Caramelized Onion Apple Cheddar

Featured in: Savory Toasts

This dish features golden bread enclosing sweet caramelized onions, thin apple slices, and rich sharp cheddar. Cooked gently in butter until the bread is crispy and the cheese melts perfectly, it offers balanced savory, sweet, and tangy flavors. A simple yet elevated take on a classic grilled cheese, it's ready in under an hour and suits vegetarian tastes. Variations include adding arugula or swapping cheeses for different flavor profiles.

Updated on Fri, 28 Nov 2025 09:23:00 GMT
Golden, bubbly Caramelized Onion, Apple & Cheddar Grilled Cheese, ready to delight your taste buds. Save
Golden, bubbly Caramelized Onion, Apple & Cheddar Grilled Cheese, ready to delight your taste buds. | butterhearth.com

A gourmet twist on the classic grilled cheese featuring sweet caramelized onions, crisp apple slices, and sharp cheddar all melted between golden buttery bread

I first enjoyed this sandwich on a chilly fall afternoon and was instantly hooked on the blend of flavors and textures

Ingredients

  • Caramelized Onions: 1 large yellow onion thinly sliced, 1 tablespoon unsalted butter, 1 teaspoon olive oil, 1/2 teaspoon salt, 1/2 teaspoon sugar (optional for extra sweetness)
  • Sandwich: 4 slices sourdough or country bread, 2 tablespoons unsalted butter softened (for spreading), 1 medium crisp apple such as Granny Smith or Honeycrisp thinly sliced, 120 g 4 oz sharp cheddar cheese sliced or shredded, freshly ground black pepper to taste

Instructions

Prepare the caramelized onions:
In a skillet over medium-low heat melt 1 tablespoon butter with olive oil Add sliced onion and salt Cook stirring often for 15–18 minutes until onions are deeply golden and soft If desired add sugar halfway through for extra sweetness Set aside
Assemble the sandwiches:
Lay out the bread slices Spread butter on one side of each slice On the unbuttered side layer half the cheddar followed by a layer of caramelized onions apple slices a pinch of black pepper and the remaining cheddar Top with the second slice of bread buttered side facing out
Cook the grilled cheese:
Heat a nonstick skillet or griddle over medium heat Place sandwiches in the skillet and cook for 3–4 minutes per side pressing gently until bread is golden brown and cheese is melted Reduce heat if bread browns too quickly
Finish and serve:
Remove from heat Let cool for 1–2 minutes then slice and serve warm
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| butterhearth.com

This sandwich became a family favorite for cozy weekend lunches and quick hearty dinners

Variations

Add baby arugula for a peppery bite or substitute Gruyère or fontina cheese for a different taste experience

Serving Suggestions

Pair the sandwich with a side of tomato soup or a crisp green salad for a balanced meal

Storage Tips

Prepare sandwiches ahead and keep them wrapped individually in the fridge for up to 2 days or freeze before cooking

Melted cheddar cheese oozes on this warm Caramelized Onion, Apple & Cheddar Grilled Cheese sandwich. Save
Melted cheddar cheese oozes on this warm Caramelized Onion, Apple & Cheddar Grilled Cheese sandwich. | butterhearth.com

This grilled cheese is a delightful upgrade to a classic comfort food that’s sure to impress

Recipe Questions

How do you caramelize onions perfectly?

Cook thinly sliced onions over medium-low heat with butter and olive oil, stirring frequently, for about 15-18 minutes until deeply golden and soft. Adding a pinch of sugar halfway enhances sweetness.

Which apple varieties work best for this dish?

Crisp and slightly tart apples like Granny Smith or Honeycrisp provide a refreshing contrast to the savory and cheesy layers.

Can I substitute cheddar with other cheeses?

Gruyère or fontina can be used instead of cheddar for a different flavor tone that melts well and complements the onions and apple.

What bread types are ideal for grilling?

Sourdough or country bread slices are preferred for their sturdy texture that browns nicely while holding the fillings without getting soggy.

Any tips for assembling the sandwich evenly?

Spread softened butter on one side of each bread slice, layer cheddar, caramelized onions, apple slices, and black pepper on the unbuttered side, then top with the remaining slice buttered side out for even grilling.

Caramelized Onion Apple Cheddar

Golden grilled bread layered with caramelized onions, crisp apple, and sharp cheddar for a satisfying meal.

Prep duration
15 min
Time to cook
25 min
Complete duration
40 min
Created by Grace Mitchell


Skill Level Easy

Heritage American

Output 2 Portions

Dietary considerations Meat-Free

Components

Caramelized Onions

01 1 large yellow onion, thinly sliced
02 1 tablespoon unsalted butter
03 1 teaspoon olive oil
04 1/2 teaspoon salt
05 1/2 teaspoon sugar (optional)

Sandwich

01 4 slices sourdough or country bread
02 2 tablespoons unsalted butter, softened
03 1 medium crisp apple (e.g., Granny Smith or Honeycrisp), thinly sliced
04 4 ounces sharp cheddar cheese, sliced or shredded
05 Freshly ground black pepper, to taste

Directions

Stage 01

Caramelize the onions: In a skillet over medium-low heat, melt 1 tablespoon butter with olive oil. Add sliced onion and salt, then cook, stirring frequently, for 15 to 18 minutes until onions turn golden and soft. Optionally, add sugar halfway through cooking for enhanced sweetness. Remove from heat and set aside.

Stage 02

Assemble the sandwiches: Lay out the bread slices and spread softened butter on one side of each. On the unbuttered sides, distribute half the cheddar cheese, followed by caramelized onions, apple slices, a pinch of black pepper, and the remaining cheddar. Top with the second slice of bread, buttered side outward.

Stage 03

Cook the sandwiches: Heat a nonstick skillet or griddle over medium heat. Place sandwiches in the pan and cook for 3 to 4 minutes per side, pressing gently, until the bread is golden brown and cheese is melted. Reduce heat if browning occurs too rapidly.

Stage 04

Rest and serve: Remove from heat and allow sandwiches to rest for 1 to 2 minutes. Slice and serve warm.

Necessary tools

  • Skillet or nonstick pan
  • Spatula
  • Knife
  • Cutting board

Allergy details

Review each component for potential allergens and consider consulting with a healthcare provider if you're unsure about certain ingredients.
  • Contains dairy and wheat; may contain gluten

Nutritional information (per portion)

These values are estimates only and shouldn't replace professional medical guidance.
  • Energy Value: 470
  • Fats: 26 g
  • Carbohydrates: 43 g
  • Protein Content: 18 g