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    Home » Recipes » Sandwiches, Wraps, and Burgers

    Vegan Grilled Cheese with Caramelized Onions and Red Pepper

    Willow Moon in front of bushes.
    Updated: Mar 14, 2025 · by Willow Moon · This post may contain affiliate links · As an Amazon Associate I earn from qualifying purchases. · I get commissions for purchases made through links in this post.
    Jump to Recipe Pin

    This rich comforting Vegan Grilled Cheese with Caramelized Onions and Red Pepper is loaded with sweet and savory flavors.

    Vegan Grilled Cheese with Caramelized Onions and Red Pepper stacked.

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    ⭐️⭐️⭐️⭐️⭐️

    "SO DELICIOUS! I'm officially obsessed with this recipe! I used "Follow Your Heart" American cheese and it tasted so yummy with the onions and peppers! Thank you so much for this recipe! - Trixie"

    If you have been following me for a while you may have noticed that I am a little obsessed with caramelized onions. One of my favorite ways to use them is in a dip, but I also love them in pasta, vegan tofu quiche, and mushroom sliders.

    So today I decided to make Vegan Grilled Cheese with Caramelized Onions and Red Pepper. There is something about caramelized onions that takes everything to a whole new level.

    They add a sweet, rich taste to whatever you put them in. If you are looking to take your vegan grilled cheese up a notch, caramelized onions are the way to go.

    Some roasted red pepper recipes to try are my Roasted Pepper Tapenade, Onion and Roasted Red Pepper Focaccia Sandwich, and Tofu Ricotta and Red Pepper Dip. A caramelized onion recipe to try is my Onion Fritters recipe.

    Other grilled cheese recipes to try are my Vegan Mushroom and Onion Grilled Cheese, Vegan Pesto Cheese Sandwich, and my Vegan Pizza Grilled Cheese recipe.

    Maple Mustard Tofu is also good in a sandwich.

    Jump to:
    • ❤️ Why You'll Love It
    • 🧾 Ingredients
    • 🔪 Instructions
    • 💭 Tips
    • 🍽 Serving
    • 👩🏻‍🍳 Recipe FAQs
    • 🥪 Other Vegan Sandwiches
    • 📋 Recipe
    • 💬 Comments

    ❤️ Why You'll Love It

    • It is rich and comforting.
    • It's better than plain old grilled cheese. The caramelized onions and red pepper elevate the grilled cheese to another level.
    • It is an easy weeknight meal.

    🧾 Ingredients

    Vegan Grilled Cheese ingredients on a cutting board with labels.
    • Onions: Yellow onion, sweet onion, or white onion all work.
    • Olive oil: To cook the onion and red pepper.
    • Salt: Enhances flavors. I like to use sea salt.
    • Balsamic vinegar: I like to add a splash of balsamic vinegar to sweeten the onion. You could also use a sprinkle of sugar or brown sugar or leave it out.
    • Red bell pepper: Adds sweetness.
    • Vegan cheddar: My favorite brands of vegan cheddar are Daiya or Follow Your Heart.
    • Vegan mayo: Adds a rich flavor. You could also use vegan butter.
    • Bread: My latest favorite is a gluten-free sourdough bread. Use your favorite bread.

    To see the full list of ingredients with measurements and instructions, see the recipe card at the bottom of this post.

    5 Secrets to Vegan Cooking

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    🔪 Instructions

    Sliced onions in a skillet.

    Step 1: Add olive oil and sliced onions to a large pan. Cook over medium heat. Stir them every few minutes.

    With caramelized onions, it's all about slow and steady. If the onions start to stick, add a little water, like a quarter of a cup or so.

    Caramelized onions in a pan.

    Step 2: Cook sliced onions in a pan until caramelized. Add brown sugar or balsamic vinegar to the frying pan near the end of cooking time to add flavor.

    Caramelized onions and chopped red pepper in a pan.

    Step 3: Add chopped red pepper and cook until softened.

    Two slices on bread on a cutting board. One with slices of vegan cheddar, the other with cooked onions and red pepper.

    Step 4: Layer caramelized onions, red pepper, and vegan cheddar cheese on bread.

    Sandwich in a pan with vegan mayo spread on top.

    Step 4: Spread vegan mayo on the outside of the bread. Place in a frying pan.

    Vegan Grilled Cheese in skillet after cooking.

    Step 5: Cook the vegan grilled cheese on both sides until golden brown.

    💭 Tips

    • When making caramelized onion, slow and steady wins the race. For caramelized onions, you need some patience. It takes a good 20 minutes to get nicely browned onions - longer if you're using more onions.
    • If they take start to stick add a little water, like a quarter of a cup or so.
    • Balsamic vinegar adds a wonderful flavor. I always add a couple of splashes near or at the end of the cooking time.

    🍽 Serving

    • Vegan Tomato Soup with Tomato Paste
    • Vegan Peanut Stew
    • Vegan Black Bean Soup recipe
    • 3 Ingredient Chili
    Vegan Grilled Cheese with Caramelized Onions and Red Pepper close up.

    👩🏻‍🍳 Recipe FAQs

    What is a vegan grilled cheese made of?

    This vegan grilled cheese is made with vegan cheddar, vegan mayo, and gluten-free bread. It has the addition of caramelized onions and red pepper.

    Is grilled cheese good without butter?

    For this vegan grilled cheese, I like to cook it in vegan mayo or vegan butter. Vegan mayo adds a rich flavor.

    🥪 Other Vegan Sandwiches

    • BBQ Lentil Sandwich with Sriracha Coleslaw on a plate.
      BBQ Lentil Sandwich with Sriracha Coleslaw
    • ALT (Avocado, Lettuce, and Tomato) Wrap on a cutting board.
      ALT (Avocado, Lettuce, and Tomato) Wrap
    • Vegan Refried Bean Burrito on a cutting board.
      Vegan Refried Bean Burrito with Jalapeño Cilantro Hummus
    • Vegan Monte Cristo on a plate.
      Vegan Monte Cristo

    If you tried this Vegan Grilled Cheese with Caramelized Onions and Red Pepper Recipe or any other recipe on my website, please leave a ⭐️ star rating and let me know how you like it in the 💬 comments below. I love hearing from you!

    Take your vegan grilled cheese to the next level by adding caramelized onion and red pepper!

    *This post was originally published on November 27, 2015. I updated the photos and added text.

    📋 Recipe

    Vegan Grilled Cheese with Caramelized Onions and Red Pepper
    Pin Print
    5 from 3 votes

    Vegan Grilled Cheese with Caramelized Onions and Red Pepper

    This rich comforting Vegan Grilled Cheese with Caramelized Onion and Red Pepper is loaded with sweet and savory flavors.
    Course Main Course
    Cuisine American
    Diet Gluten Free, Vegan, Vegetarian
    Prep Time 5 minutes minutes
    Cook Time 30 minutes minutes
    Total Time 35 minutes minutes
    Servings 2
    Calories 484kcal
    Author Willow Moon
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    Ingredients

    • 4 slices gluten free bread
    • ½ a medium onion sliced
    • 2 tablespoons olive oil
    • Salt
    • Splash of balsamic vinegar optional
    • ½ cup chopped red pepper
    • 4 slices vegan cheddar or ½ cup grated
    • 4 teaspoons vegan mayo or Earth Balance
    US Customary - Metric

    Instructions

    • Heat olive oil in pan at medium heat and add sliced onion. Add salt.
    • Stir the onions every five minutes or so. Cook for about 20 minutes.
    • Add a small amount of balsamic vinegar to deglaze the pan.
    • Add red pepper and cook until softened.
    • Layer vegan cheddar, caramelized onion, and red pepper on a slice of bread. Top with other slice of bread.
    • Spread 1 teaspoon of vegan mayo on the outside of one of the slices of bread. Place face down in a hot pan. While the grilled cheese is cooking over medium heat, spread the other teaspoon of vegan mayo on the other piece of bread (the side facing you).
    • Cook until golden brown on both sides. Repeat with the other sandwich.
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    Nutrition

    Calories: 484kcal | Carbohydrates: 43g | Protein: 4g | Fat: 31g | Saturated Fat: 5g | Cholesterol: 12mg | Sodium: 578mg | Potassium: 137mg | Fiber: 3g | Sugar: 7g | Vitamin A: 1695IU | Vitamin C: 50.6mg | Calcium: 96mg | Iron: 0.6mg

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    *Note: Nutrition information should be considered an estimate only. Different nutrition calculators give you different results.

    More Sandwiches, Wraps, and Burgers

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      Vegan Caramelized Onion and Mushroom Grilled Cheese
    • Vegan Lunch Meat in a sandwich on a cutting board.
      Vegan Lunch Meat
    • Benedictine Tea Sandwiches on a plate.
      Benedictine Tea Sandwiches

    Reader Interactions

    Comments

      5 from 3 votes (2 ratings without comment)

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      Recipe Rating




    1. lanna says

      July 02, 2024 at 1:03 pm

      Hi Willow, I love your recipes and have tried several. I'm wondering if you've tried Organic Melt? I prefer it, but wonder if it is as healthy as your choice of Earth Balance. Thank you Lanna

      Reply
      • Willow Moon says

        July 02, 2024 at 3:47 pm

        Hi Lanna, thank you! No I haven't tried it yet. It looks like it has similar ingredients to Earth Balance, but I'd love to try them side by side.

        Reply
    2. Trixie Klein says

      June 13, 2020 at 6:50 pm

      SO DELICIOUS! I’m officially obsessed with this recipe! I used “Follow Your Heart” American cheese and it tasted so yummy with the onions and peppers! Thank you so much for this recipe!5 stars

      Reply
      • Willow Moon says

        June 14, 2020 at 5:37 am

        Thanks Trixie, I’m so glad you liked it!

        Reply

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