Keto Meatball Casserole

By Lily | Last modified on Mar 2, 2026

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Keto Meatball Casserole

This Keto Meatball Casserole has become a beloved dish in my household, delivering comfort with every bite. The tender, juicy meatballs are infused with aromatic herbs and baked to perfection, creating a warm, hearty meal that’s perfect for any night of the week.

Covered in rich, sugar-free marinara sauce and melted mozzarella cheese, this casserole combines luscious flavors with a satisfying low-carb profile that fits perfectly into a ketogenic lifestyle.

Why You’ll Love This Recipe

  • It’s a comforting and filling low-carb dinner ideal for keto and low-carb diets.
  • Easy to prepare with simple pantry ingredients and minimal prep time.
  • Perfect for meal prep or family dinners with gooey cheese and flavorful meatballs.

Ingredients

  • Ground beef: Fresh, lean ground beef forms the flavorful, juicy base for tender meatballs.
  • Almond flour: A low-carb binder for meatballs that adds texture and keeps them moist.
  • Large egg: Acts as a natural binder to hold meatball ingredients together evenly.
  • Grated Parmesan cheese: Adds a sharp, nutty flavor enhancing the meatball’s richness.
  • Garlic cloves, minced: Fresh garlic provides aromatic depth and a savory punch to the meat mixture.
  • Italian seasoning: A fragrant blend of herbs to boost the traditional Italian flavor profile.
  • Salt and pepper: Essential seasonings that balance and enhance the overall taste.
  • Sugar-free marinara sauce: A low-carb tomato sauce layering moisture and robust taste over the meatballs.
  • Shredded mozzarella cheese: Melts gooey and golden, creating an irresistible cheesy crust on top.

Instructions

Preheat Oven to 375°F (190°C)

Set your oven to the right temperature to ensure even cooking. Preheating helps the casserole cook thoroughly and the cheese to melt perfectly.

Combine Meatball Ingredients

In a large mixing bowl, blend ground beef with almond flour, egg, Parmesan, minced garlic, Italian seasoning, salt, and pepper. Mixing well ensures uniform flavor and consistent texture in each meatball.

Form and Arrange Meatballs

Shape the mixture into evenly sized meatballs, about 1.5 inches each, and place them spaced apart in a greased 9×13-inch baking dish. This helps them cook evenly without sticking together.

Add Marinara Sauce and Cheese

Pour the sugar-free marinara sauce gently over the meatballs covering them completely. Then, sprinkle shredded mozzarella cheese on top to create a luscious and bubbly cheese layer while baking.

Bake Until Cooked and Bubbling

Place the dish in the oven and bake for 25–30 minutes, or until the meatballs are cooked through and the cheese is melted and golden. This step brings all flavors together with a cheese crust and tender center.

Serve Warm and Enjoy

Let the casserole cool for a few minutes before serving to allow flavors to settle and prevent burns. Ideal for enjoying a comforting, keto-friendly meal any day.

You Must Know

  • Use sugar-free marinara to keep the dish keto compliant and reduce hidden carbs.
  • Almond flour keeps meatballs tender without traditional breadcrumbs.
  • Adjust spice levels with additional Italian seasoning or crushed red pepper if preferred.

Storage Tips

Store leftovers in an airtight container in the refrigerator for up to 4 days. Reheat gently in the oven or microwave to retain the casserole’s creamy texture and flavor.

Serving Suggestions

Pair this keto casserole with a fresh green salad or steamed low-carb vegetables like zucchini noodles or roasted asparagus for a balanced meal.

Professional Tips

  • For even cooking, try to make all meatballs the same size.
  • Let the meat mixture rest for 10 minutes before shaping to enhance flavor absorption.
  • If you want extra cheesiness, add a sprinkle of mozzarella halfway through baking.

FAQs

Can I use a different type of ground meat?

Yes, ground turkey or chicken can be used but may result in a leaner and less juicy meatball.

Is almond flour necessary?

Almond flour acts as a low-carb binder replacing traditional breadcrumbs; coconut flour can be substituted with adjustments.

Can I make this recipe ahead of time?

Absolutely, assemble and refrigerate up to 24 hours before baking, or freeze cooked casserole for later.

What if I don’t have Italian seasoning?

Use a mix of dried basil, oregano, thyme, and rosemary as a homemade alternative.

How do I know when meatballs are cooked through?

They should reach an internal temperature of 160°F (71°C) and no longer be pink inside.

Can I double this recipe?

Yes, just use a larger baking dish or bake in two batches to ensure even cooking.

Keto Meatball Casserole

Keto Meatball Casserole

A hearty keto casserole featuring tender meatballs baked in rich marinara sauce topped with gooey mozzarella, perfect for a comforting low-carb meal the whole family will love.
Prep Time 15 minutes
Cook Time 30 minutes
Total Time 45 minutes
Course casserole, dinner
Cuisine Italian
Servings 4 people
Calories 450 kcal

Equipment

  • 1 9x13-inch baking dish greased
  • 1 mixing bowl

Ingredients
  

  • 1 pound ground beef
  • 1/2 cup almond flour
  • 1 large egg
  • 1/4 cup grated Parmesan cheese
  • 2 cloves garlic minced
  • 1 teaspoon Italian seasoning
  • Salt and pepper to taste
  • 2 cups sugar-free marinara sauce
  • 1 cup shredded mozzarella cheese

Instructions
 

  • Preheat the oven to 375°F (190°C).
  • In a mixing bowl, combine ground beef, almond flour, egg, Parmesan cheese, minced garlic, Italian seasoning, salt, and pepper.
  • Mix ingredients thoroughly until well combined.
  • Shape the mixture into meatballs and place them evenly in the greased baking dish.
  • Pour marinara sauce over the meatballs.
  • Sprinkle shredded mozzarella cheese evenly on top.
  • Bake uncovered for 25 to 30 minutes, until meatballs are fully cooked and cheese is melted and bubbly.
  • Serve warm and enjoy.

Notes

  • Use sugar-free marinara to keep the dish keto-friendly.
  • Store leftovers in an airtight container in the fridge for up to 3 days.
  • Reheat in the oven or microwave until warmed through.

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