Meatloaf is a comforting classic that never goes out of style, and this version takes it up a notch with caramelized onions and balsamic vinegar, adding deep, rich flavor to every bite. Not only is this recipe packed with protein, but it’s also gluten-free and contains no added sugar, making it a nutritious option the whole family will love. If you’re looking for a healthy meatloaf recipe, this one is a must-try.

A healthy meatloaf recipe with caramelized onions and balsamic vinegar. Lots of flavor with no added sugar and gluten free.

Why You’ll Love This Meatloaf

This meatloaf is a step above the traditional version thanks to a few simple but powerful ingredient swaps. Instead of using bread crumbs, we opt for almond flour, which keeps it gluten-free while adding a subtle nuttiness. Tomato paste replaces ketchup, cutting out unnecessary sugar while enhancing the savory taste. The combination of caramelized onions and balsamic vinegar creates a sweet and tangy depth that makes this dish absolutely irresistible.

Another advantage of this recipe is the baking method. Instead of shaping the meat mixture into a loaf and baking it in a loaf pan, I spread it evenly into a 9×13 glass baking dish. This allows the meatloaf to cook faster and ensures even cooking throughout. Plus, it makes serving a breeze—simply cut into squares and serve without the hassle of slicing a traditional loaf shape. This method also makes it an excellent choice for feeding a large family, as it provides plenty of servings with minimal effort.

Healthy Meatloaf Instructions

Caramelize the Onions: In a pan over medium heat, warm the olive oil and add the sliced onions. Cook slowly, stirring occasionally, until they turn golden brown and soft. This should take about 15 minutes. Add the balsamic vinegar and celery seed and stir well, letting the flavors meld for another 2-3 minutes. Remove from heat and let cool slightly. Blend with an immersion blender till it becomes a puree.

woman standing over a pot showing off caramelized onions

woman using an immersion blender to make onion puree

pureed caramelized onions in a cast iron pot

Prepare the Meat Mixture: In a large bowl, combine the ground meat, almond flour, tomato paste, egg, salt, pepper, garlic powder, and thyme. Add in the caramelized onions and mix everything together until well incorporated.

woman mixing together healthy meatloaf mixture in a bowl

Shape and Bake: Instead of forming the mixture into a loaf, spread it evenly into a 9×13 glass baking dish. This allows the meatloaf to cook faster and ensures even cooking. Bake at 375°F for 35-40 minutes, or until the internal temperature reaches 160°F.

woman spreading out healthy meatloaf mixture in a glass casserole baking dish

Rest and Serve: Let the meatloaf rest for about 10 minutes before slicing. Using a baking dish makes it easy to cut into squares, making serving much simpler. Transfer to a serving plate.

woman cutting up healthy meatloaf in a cozy kitchen

A Family Favorite

This hearty meatloaf is full of bold, satisfying flavors, making it a hit at the dinner table. Whether served with roasted vegetables, mashed potatoes, or a fresh salad, it’s a wholesome meal that delivers both taste and nutrition. The ease of baking it in a 9×13 dish means less time waiting and more time enjoying a delicious homemade meal. Plus, its generous portions make it perfect for feeding a large family with minimal effort. Enjoy a comforting, homemade dish that’s as healthy as it is delicious!

healthy meatloaf on a serving plate on a counter in a beautiful kitchen

healthy meatloaf on a plate and mashed potatoes and green beans

I hope you enjoy this simple Healthy Meatloaf Recipe with Caramelized Onions and Balsamic vinegar. Please leave a comment and let me know if you’ve tried it out, I love to hear from you!

Looking for more dinner ideas this week?

If you’re looking for more easy weeknight meals, check out my Week of Slow Cooker Meals here!

Meatloaf with Caramelized Onions and Balsamic Vinegar

A meatloaf recipe that is loaded with flavor and also gluten free and no added sugar.

Print Recipe Pin Recipe

Prep Time 30

Cook Time 45

Total Time 1 15

Course Dinner

Servings 8

Ingredients

2 pounds ground beef
3 large onions sliced
2 tbsp coconut oil
2 tbsp balsamic vinegar
½ cup almond flour
3 tbsp tomato paste
2 egg
1 tsp salt
½ tsp black pepper
1 tsp garlic powder
1 tsp onion powder
1 tsp celery seed

Instructions

Caramelize the Onions:

In a pan over medium heat, warm the coconut oil and add the sliced onions. Season with a bit of salt. Cook slowly, stirring occasionally, until they turn golden brown and soft. This should take about 15-20 minutes. Add the balsamic vinegar and celery seed and stir well, letting the flavors meld for another 2-3 minutes. Remove from heat and let cool slightly. Puree with an immersion blender.

Prepare the Meat Mixture:

In a large bowl, combine the ground meat, almond flour, tomato paste, egg, salt, pepper, garlic powder, and onion powder. Add in the caramelized onion puree and mix everything together until well incorporated.

Shape and Bake:

Instead of forming the mixture into a loaf, spread it evenly into a 9×13 glass baking dish. This allows the meatloaf to cook faster and ensures even cooking. Bake at 375°F for 40 minutes, or until the internal temperature reaches 160°F.

Rest and Serve:

Let the meatloaf rest for about 10 minutes before slicing. Using a baking dish makes it easy to cut into squares, making serving much simpler. Transfer to a serving plate.

Keyword meatloaf

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Healthy Meatloaf with Caramelized Onions and Balsamic Vinegar | Gluten Free & No Added Sugar