This cheesy keto chicken Alfredo bake is creamy, comforting, and loaded with broccoli. Shredded chicken and tender florets get tossed in Alfredo sauce, then baked under a layer of mozzarella and Parmesan until golden and bubbly.

Using rotisserie chicken and a jar of keto-friendly Alfredo sauce keeps the prep to about 15 minutes. It is a complete low-carb meal in one 8×8 dish, and it serves 4.

Why This Chicken Alfredo Bake Works

Classic chicken Alfredo is built on a big pile of fettuccine. This bake swaps the pasta for broccoli, which soaks up the creamy sauce and adds color, crunch, and fiber without the carbs. You still get that rich, garlicky, cheesy flavor in every bite.

Because the chicken is already cooked and the broccoli is already steamed, the oven only has to heat everything through and brown the cheese. That keeps the chicken juicy and the whole dish on the table in about 40 minutes.

Ingredients and Easy Swaps

• Cooked shredded chicken (2 cups): Rotisserie chicken is the easiest. Leftover grilled chicken or cooked turkey also work.
• Steamed broccoli florets (1 1/2 cups): Fresh or frozen. Cauliflower florets are a good swap, or use half of each.
• Keto-friendly Alfredo sauce (1 cup): Check jar labels for starches or added sugar. Homemade Alfredo made with butter, cream, and Parmesan is naturally keto.
• Shredded mozzarella (1 cup) and grated Parmesan (1/2 cup): Try provolone or Italian blend cheese for a change.
• Garlic powder, salt, and pepper: Add a pinch of red pepper flakes or Italian seasoning if you like.

How to Make It at a Glance

1. Heat the oven to 375°F and grease an 8×8 baking dish.
2. Stir together the chicken, broccoli, Alfredo sauce, garlic powder, salt, and pepper.
3. Spread the mixture in the dish.
4. Top with the mozzarella and Parmesan.
5. Bake 20 to 25 minutes, until bubbly and golden on top.

Common Mistakes to Avoid

• Wet broccoli. Drain steamed or thawed broccoli well and pat it dry. Extra water thins the sauce.
• Overcooked broccoli. Steam it just until bright green and tender-crisp. It softens more in the oven.
• Picking the wrong jar. Many Alfredo sauces contain flour or starch. Read the label to keep it keto.
• Serving it lukewarm. Make sure the center is hot, at least 165°F, before serving.

Variations

• Bacon Alfredo: Stir in 4 slices of crumbled cooked bacon.
• Spinach and mushroom: Add a handful of baby spinach and sautéed mushrooms.
• Sun-dried tomato: Add 1/4 cup of chopped sun-dried tomatoes for a tangy twist.
• Family size: Double everything and bake in a 9×13 dish for about 30 minutes.

What to Serve With It

A crisp Caesar or green salad is the easiest pairing. Roasted asparagus, garlic green beans, or sautéed zucchini keep the meal low carb. If some people at the table are not eating keto, serve their portion over pasta or with a slice of garlic bread.

Make Ahead, Storage, and Reheating

Make ahead: Assemble the bake, cover, and refrigerate up to 24 hours. Add 5 to 10 minutes to the bake time.

Storage: Keep leftovers covered in the fridge for 3 to 4 days. It makes a good packed lunch.

Reheating: Microwave single portions for 1 to 2 minutes, or warm the dish covered at 350°F for 15 to 20 minutes. Cream sauces can separate when frozen, so this one is best kept in the fridge.

Keto Chicken Alfredo Bake FAQ

Is jarred Alfredo sauce keto?
Some are. Look for brands with 2 grams of carbs or less per serving and no flour or starch in the ingredients.

Can I use frozen broccoli?
Yes. Thaw it, drain it well, and pat it dry. No need to steam it first.

Can I use raw chicken?
Cook it first. Raw chicken would need much longer to reach 165°F and would water down the sauce.

Tips for the Best Chicken Alfredo Bake

• Season the sauce. Jarred Alfredo can taste flat. Taste it before mixing and add garlic powder, black pepper, or a pinch of nutmeg as needed.
• Cut broccoli into small florets. Smaller pieces get coated in sauce and are easier to eat with the chicken.
• Layer the cheeses. Put the mozzarella down first and the Parmesan on top. The Parmesan browns and crisps, while the mozzarella stays melty underneath.
• Rest before serving. Give it 5 minutes out of the oven so the sauce thickens a little and does not run across the plate.

How to Make Quick Keto Alfredo Sauce

If you cannot find a keto-friendly jar, homemade Alfredo takes about 10 minutes. Melt 2 tablespoons of butter in a saucepan over medium heat and cook 1 minced garlic clove for 30 seconds. Pour in 3/4 cup of heavy cream and simmer gently for 3 to 4 minutes, stirring often. Take it off the heat and whisk in 1/2 cup of grated Parmesan until smooth. Season with salt and pepper. That makes about 1 cup, just right for this recipe.

Leftover Ideas

• Stuffed zucchini boats: Spoon leftovers into halved zucchini and bake at 375°F for 15 to 20 minutes.
• Alfredo omelet: Fold warm leftovers into eggs for a filling breakfast.
• Lunch bowls: Serve over cauliflower rice with a handful of spinach.