Caramelized Onion Apple Cheddar

Featured in: Soft Weekend Treats

This grilled sandwich pairs sweet caramelized onions with crisp apple slices and sharp cheddar cheese, all melted between buttery sourdough bread. The onions are slowly cooked until golden and tender, lending a rich sweetness that complements the tartness of the apples. Cooked over medium heat until golden brown and gooey, this easy-to-make dish offers a delicious balance of savory and fruity flavors in every bite.

Updated on Fri, 28 Nov 2025 13:33:00 GMT
Golden, melty Caramelized Onion, Apple & Cheddar Grilled Cheese with crisp apple slices visible. Save
Golden, melty Caramelized Onion, Apple & Cheddar Grilled Cheese with crisp apple slices visible. | rosewoodoven.com

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

I first made this sandwich to impress my family and it quickly became a beloved comfort food staple

Ingredients

  • For the 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)
  • For the 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
Remove from heat:
Let cool for 1–2 minutes then slice and serve warm
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| rosewoodoven.com

This sandwich always brings my family together for a warm cozy meal

Required Tools

Skillet or nonstick pan Spatula Knife Cutting board

Allergen Information

Contains Dairy (butter cheese) Wheat (bread) May contain Gluten (bread) Double-check bread and cheese labels for potential allergens

Nutritional Information

Calories 470 Total Fat 26 g Carbohydrates 43 g Protein 18 g

A close-up of a Caramelized Onion, Apple & Cheddar Grilled Cheese, perfectly grilled to a golden hue. Save
A close-up of a Caramelized Onion, Apple & Cheddar Grilled Cheese, perfectly grilled to a golden hue. | rosewoodoven.com

Enjoy this decadent grilled cheese fresh off the skillet for the best flavor and texture

Recipe Q&A Section

How do you achieve perfectly caramelized onions?

Cook thinly sliced onions slowly over medium-low heat with butter and olive oil, stirring often until they turn deep golden and soft, about 15-18 minutes.

Which apple varieties work best for this sandwich?

Granny Smith and Honeycrisp apples add a crisp, tart contrast that balances the sweetness of the caramelized onions well.

Can I substitute the cheese used?

Gruyère or fontina can replace sharp cheddar for a different, yet complementary, flavor profile.

What type of bread is recommended?

Sourdough or country bread provides a sturdy base that crisps nicely and holds the fillings without becoming soggy.

How do I prevent the bread from burning while cooking?

Use medium heat and press gently with a spatula, reducing heat as needed to ensure even browning and melted cheese.

Caramelized Onion Apple Cheddar

Golden grilled sandwich layered with caramelized onions, crisp apples, and melted cheddar on buttery sourdough bread.

Time to Prepare
15 min
Time to Cook
25 min
Complete Duration
40 min
Created by Clara Whitmore


Skill Level Easy

Cuisine Type American

Serving Size 2 Portions

Dietary Details Meatless

What's Needed

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

How To Make It

Step 01

Caramelize onions: Melt butter with olive oil in a skillet over medium-low heat. Add sliced onion and salt, cooking and stirring frequently for 15 to 18 minutes until onions are soft and deeply golden. Optionally, incorporate sugar halfway through for added sweetness. Set aside.

Step 02

Assemble sandwiches: Spread softened butter on one side of each bread slice. On the unbuttered side, layer half the cheddar cheese, caramelized onions, apple slices, a sprinkle of black pepper, and the remaining cheddar. Top with the second slice of bread, buttered side facing out.

Step 03

Grill sandwiches: Heat a nonstick skillet or griddle over medium heat. Cook sandwiches for 3 to 4 minutes per side, gently pressing, until bread is golden brown and cheese is melted. Reduce heat if bread browns too quickly.

Step 04

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

Essential Tools

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

Allergy Warnings

Look over every ingredient for possible allergens and check with your healthcare provider if unsure.
  • Contains dairy (butter, cheese) and wheat (bread). May contain gluten.

Nutrition Details (each serving)

Nutritional numbers are simply a guide and shouldn't replace professional nutrition advice.
  • Energy (Calories): 470
  • Lipids: 26 g
  • Carbohydrates: 43 g
  • Proteins: 18 g