These keto stuffed peppers skip the rice and fill bell pepper halves with seasoned ground beef, a little tomato, heavy cream, and mozzarella. The cream turns the beef into a rich, saucy filling, and the cheese on top bakes up bubbly and golden. It tastes like a classic stuffed pepper, just creamier and lower in carbs.

You need ten ingredients, one skillet, and one baking dish. Four peppers cut in half give you 8 boats, which feeds four people. Plan on about an hour from start to finish, and most of that is hands-off oven time.

Why These Keto Stuffed Peppers Work

Most stuffed peppers use rice to bulk up the filling and soak up the juices. Here, heavy cream and mozzarella do that job. When you simmer the cream with the browned beef for a few minutes, it thickens and coats the meat, so the filling stays moist in the oven instead of drying out. Half the cheese melts into the filling to bind it, and the other half goes on top.

Cutting the peppers in half instead of leaving them whole matters too. Halves cook through in 25 to 30 minutes at 375°F, so there is no need to blanch them first. Brushing the insides with olive oil helps them soften and keeps the edges from scorching.

Ingredients and Easy Swaps

Bell peppers: Pick wide, flat-bottomed peppers so the halves sit level in the dish. Green peppers are lowest in carbs and have a slightly bitter bite. Red, yellow, and orange peppers are sweeter.

Ground beef: An 80/20 or 85/15 blend gives the best flavor. Drain the fat after browning so the filling does not turn greasy. Ground turkey or Italian sausage (casings removed) work as swaps. Turkey needs to reach 165°F instead of 160°F.

Onion and diced tomatoes: Half an onion and 1/2 cup of tomatoes add flavor without adding many carbs. Drain canned tomatoes well, or the filling will be runny. Fresh chopped tomato works too.

Heavy cream and mozzarella: Heavy cream has very few carbs, which is why it shows up so often in keto cooking. Do not swap in milk. It is higher in carbs and will not thicken the same way. Cheddar, Monterey Jack, or a shredded Italian blend can replace the mozzarella.

How to Make It at a Glance

1. Heat the oven to 375°F. Halve and seed the peppers, brush with olive oil, and set them in a baking dish.
2. Brown the beef with the onion, salt, pepper, and Italian seasoning until no pink remains (160°F), then drain.
3. Stir in the tomatoes and 1/2 cup of mozzarella.
4. Add the heavy cream and simmer a few minutes until it thickens slightly.
5. Fill the peppers, top with the rest of the cheese, and bake 25 to 30 minutes.

Common Mistakes to Avoid

Skipping the drain. A pound of ground beef can leave several tablespoons of fat in the pan. If you leave it in, it pools in the bottom of the peppers and the cream sauce can separate.

Boiling the cream hard. Keep it at a gentle simmer over medium-low heat. A hard boil can make it split and look grainy. You want it to coat the back of a spoon, which takes about 3 to 5 minutes.

Underbaking the peppers. The filling is already cooked, so the oven time is really for the peppers. Poke one with a fork. It should slide in easily. If the cheese browns before the peppers soften, cover the dish loosely with foil.

Crowding the dish. A 9×13-inch dish fits 8 halves snugly. Packing them into a smaller pan traps steam and leaves a puddle of liquid.

Variations

Taco style: Swap the Italian seasoning for 1 tablespoon of taco seasoning, use cheddar or pepper jack, and top with sour cream and sliced jalapeños.

Philly cheesesteak: Add sliced mushrooms with the onion and use provolone in place of mozzarella.

Cauliflower rice: For a filling closer to the classic version, stir 1 cup of cooked cauliflower rice into the beef along with the tomatoes.

Spinach and parmesan: Wilt a big handful of spinach into the beef and sprinkle grated parmesan over the mozzarella before baking.

What to Serve With It

Keep the sides simple and low carb. A green salad with a vinegar dressing cuts through the rich filling. Roasted broccoli, garlicky green beans, or zucchini sautéed in butter all fit. For more ideas along the same lines, see our keto beef recipes and easy keto meals for beginners.

Make Ahead, Storage, and Reheating

Make ahead: Cook the filling and stuff the peppers up to 1 day ahead. Cover the dish and refrigerate. Add about 5 to 10 minutes to the bake time since it goes in cold.

Fridge: Keep leftovers in an airtight container for up to 4 days.

Freezer: Freeze baked peppers for up to 3 months. The peppers get softer after thawing, but the flavor holds up well. Thaw overnight in the fridge.

Reheating: Warm covered in a 350°F oven for 15 to 20 minutes, or microwave one half at a time for about 2 minutes. Heat until the center is hot all the way through, 165°F for leftovers.

Frequently Asked Questions

Do I need to precook the peppers?
No. Halved peppers soften in the 25 to 30 minutes of baking. If you like them very soft, roast the oiled halves alone for 10 minutes before filling.

Are bell peppers keto friendly?
Yes, in normal portions. They are lower in carbs than most vegetables people stuff, and green peppers are the lowest of the bunch.

Why is my filling watery?
Usually the tomatoes were not drained, or the cream did not simmer long enough. Let the mixture cook until it looks saucy, not soupy, before you fill the peppers.

Can I make them in the air fryer?
Yes. Cook 3 or 4 filled halves at a time at 350°F for 12 to 15 minutes, until the peppers are tender and the cheese is browned.