Beef Gratin is a rich, oven-baked comfort dish usually layered with beef, sauce, and beans under a cheesy topping. In this keto-friendly version, traditional beans are replaced with low-carb alternatives like green beans or black soybeans, giving you the same hearty texture without the high carbs. The result is a creamy, savory, cheesy casserole with deep beef flavor and a golden crust.
The base of this gratin is seasoned ground beef cooked with garlic, onions, and spices in a creamy tomato or cream-based sauce. The “bean” layer adds structure and bite—green beans keep it crisp and fresh, while black soybeans (if used) offer a more traditional bean-like texture with far fewer net carbs than regular beans. Everything is topped with melted cheese that browns beautifully in the oven or air fryer.
This dish works perfectly for meal prep because it stores and reheats well without losing texture. It’s filling enough to serve as a full dinner on its own, but also pairs well with salads or cauliflower mash. The combination of beef, cream, and cheese makes it very satisfying for keto eating while still feeling like classic comfort food.
Keto Beef & Bean Gratin is ideal when you want something hearty, warm, and oven-baked without breaking your low-carb goals. It delivers the cozy, layered feel of a traditional gratin while keeping carbs low and protein high.
Ingredients
- 1 lb ground beef
- 2 cups green beans (trimmed) or 1 cup black soybeans (cooked, drained)
- 1 small onion, chopped
- 3 cloves garlic, minced
- 1/2 cup heavy cream
- 1/2 cup cream cheese (softened)
- 1/2 cup shredded cheddar cheese
- 1/4 cup parmesan cheese
- 1 tablespoon tomato paste (optional, for depth)
- 1 teaspoon paprika
- 1/2 teaspoon salt
- 1/2 teaspoon black pepper
- 1/2 teaspoon Italian seasoning
- 1 tablespoon olive oil or butter
Instructions
- Preheat oven or air fryer to 375°F (190°C).
- Heat oil in a pan and sauté onion and garlic until fragrant.
- Add ground beef, salt, pepper, paprika, and cook until browned. Drain excess fat if needed.
- Stir in tomato paste (optional), cream cheese, and heavy cream until smooth and creamy.
- Add green beans (lightly blanched) or black soybeans and mix well.
- Transfer mixture to a baking dish.
- Top with cheddar and parmesan cheese evenly.
- Bake or air fry for 12–18 minutes, until cheese is melted and golden on top.
- Let rest for 5 minutes before serving.
Tips
- Green beans keep it lighter and fresher; black soybeans make it more “traditional bean casserole”-like.
- Don’t skip draining beef fat or the gratin may turn greasy.
- Add mozzarella for extra cheese pull.
- A pinch of chili flakes adds nice heat.
- Let it rest before serving so it sets properly.
- You can prep it ahead and bake when needed.
- For extra richness, add a splash of beef broth while cooking.
- Works great as leftovers—the flavor deepens overnight.
Nutrient Facts
Approximate per serving (1 of 4)
- Calories: 420–520
- Protein: 28–35 g
- Fat: 32–40 g
- Carbohydrates: 6–10 g (lower if using green beans)
- Net Carbs: 3–7 g
- Fiber: 2–4 g
- Sugar: 2–4 g
- Cholesterol: 110–140 mg
- Sodium: 450–700 mg
