There’s something magical about pulling a bubbling, golden-topped casserole out of the oven on a chilly evening. The aroma of sharp cheddar mingling with garlicky cream sauce and tender chicken instantly transports me back to my grandmother’s farmhouse kitchen—only this version is proudly low-carb and keto-friendly. I developed this Keto Creamy Chicken and Broccoli Casserole after one too many “sad desk lunches” of plain grilled chicken and steamed broccoli. I wanted the comfort-food vibe of the classic Midwestern casserole without the canned soup, starchy fillers, or carb overload that would knock me out of ketosis. After six test batches (my neighbors were thrilled), the winning formula emerged: juicy thigh meat for maximum flavor, a quick stovetop cheese sauce thickened with cream cheese instead of flour, and just enough broccoli to keep it virtuous. It’s become my go-to for Sunday meal prep, pot-luck dinners, and those nights when only something creamy, cheesy, and soul-warming will do. Serve it straight from the skillet for a rustic supper, or dress it up in a pretty baking dish for company; either way, it’s proof that keto eating never has to feel like deprivation.

Why This Recipe Works

One-pan wonder: The entire dish—sauce, chicken, and veg—comes together in a single oven-safe skillet or casserole, minimizing dishes and maximizing flavor.
Ultra-creamy, no flour: A blend of cream cheese, heavy cream, and sharp cheddar thickens beautifully without roux, keeping carbs under 6 g net per serving.
Meal-prep hero: Tastes even better the next day; reheat portions for grab-and-go lunches or freeze for up to three months.
Family-friendly: Kids devour the cheesy sauce and tender chicken while you quietly pat yourself on the back for the hidden veggies.
Flexible flavor profiles: Swap cheddar for pepper jack, add bacon, or stir in pesto—see the variations below.
Macros on point: 36 g protein and only 5 g net carbs keep you satiated and in ketosis.

Ingredients You'll Need

Quality ingredients make or break a keto casserole. Because the sauce is dairy-forward, splurge on block cheese you grate yourself—pre-shredded cellulose-coated shreds don’t melt as silkily. For the chicken, I prefer boneless, skinless thighs; they stay juicy under the creamy blanket and bring more flavor than breast meat. If you only have breasts, pound them to an even ¾-inch thickness and reduce the initial sear by 1 minute. Fresh broccoli florets hold their texture better than frozen, but if you’re in a pinch, thaw and squeeze frozen florets very dry.

Chicken: 2 lb (900 g) boneless skinless chicken thighs, cut into 1-inch pieces. Substitute an equal weight of turkey thigh or canned chicken (drained) for a pantry version.

Broccoli: 4 cups small florets (about 12 oz/340 g). Choose deep-green crowns with tightly closed buds. Peel the stems and dice them; they add sweetness and reduce waste.

Sharp Cheddar: 2 cups (8 oz/225 g) freshly grated. Extra-old gives the boldest flavor, but mild or white cheddar works. For dairy-free, try a meltable plant-based cheddar with 2 tsp nutritional yeast for umami.

Cream Cheese: 6 oz (170 g) full-fat, cubed and softened. Soften 20 seconds in the microwave so it melts evenly into the sauce.

Heavy Cream: 1 cup (240 ml). Use the highest fat percentage you can find (36–40 %). In a pinch, combine ¾ cup canned coconut cream with ¼ cup almond milk, but the flavor will shift slightly tropical.

Chicken Broth: ½ cup (120 ml) low-sodium. Homemade is gold; otherwise choose a brand with no added sugar.

Aromatics & Seasonings: 2 Tbsp butter, 3 minced garlic cloves, ½ small diced onion (or 1 tsp onion powder to keep carbs lower), 1 tsp Dijon mustard, ½ tsp dried thyme, ¼ tsp smoked paprika, ½ tsp each salt and pepper, plus more to taste.

Optional crunch topping: ¼ cup pork panko or crushed pork rinds mixed with 1 Tbsp melted butter. This keeps the casserole keto; omit for nut-free or substitute blanched slivered almonds for a different texture.

How to Make Keto Creamy Chicken and Broccoli Casserole with Cheddar

Prep and pre-cook the broccoli

Steam or microwave the broccoli for 2 minutes, just until bright green and barely fork-tender. This prevents watery casserole and ensures the florets stay vivid. Spread on a clean towel to cool and absorb excess moisture.

Sear the chicken

Heat a 12-inch oven-safe skillet over medium-high. Add 1 Tbsp butter. Season chicken with ½ tsp salt, ¼ tsp pepper, and the smoked paprika. Sear in a single layer 4 minutes without stirring for golden edges. Flip and cook 2 minutes more (it will finish in the oven). Transfer to a plate; reserve drippings.

Build the aromatics

Lower heat to medium; add remaining 1 Tbsp butter and diced onion. Sauté 2 minutes until translucent. Stir in garlic and thyme; cook 30 seconds until fragrant.

Create the creamy base

Pour in chicken broth; scrape browned bits. Add cream cheese cubes and Dijon. Whisk constantly until cream cheese melts into a smooth, thick sauce, about 3 minutes.

Enrich with cream and cheese

Reduce heat to low. Stir in heavy cream and 1½ cups of the cheddar. Keep stirring until cheese melts into a velvety blanket. Taste; add up to ¼ tsp salt or pepper as desired.

Combine the casserole components

Return seared chicken (and any juices) to the skillet. Fold in par-cooked broccoli until everything is coated in sauce. Spread evenly; top with remaining ½ cup cheddar.

Add crunch (optional)

Mix pork panko with 1 Tbsp melted butter; sprinkle over the cheese. This bakes into a crave-worthy crispy crust that mimics traditional bread crumbs.

Bake to golden perfection

Transfer skillet to a preheated 400 °F (200 °C) oven. Bake 12–15 minutes, until casserole is bubbling at the edges and cheese is bronzed. Broil 1–2 minutes for extra color, watching closely.

Rest and serve

Let stand 5 minutes to thicken. Garnish with chopped parsley or chives for a pop of color. Spoon into bowls and enjoy the molten, cheesy goodness.

Expert Tips

Don’t crowd the pan

Searing chicken in two batches develops fond (those brown bits) that seasons the entire sauce. Crowding causes steaming and pale meat.

Soften cream cheese quickly

Cube and microwave 15–20 seconds or place in a zip bag and submerge in warm water. Cold bricks refuse to melt smoothly.

Control moisture

Pat chicken dry before searing and steam broccoli briefly. Excess water thins the sauce, so the casserole won’t cling luxuriously.

Grate your own cheese

Pre-shredded cellulose-coated shreds can turn grainy. A box grater takes two minutes and yields velvet-smooth melting.

Spice it up or down

Add ¼ tsp cayenne or a spoon of diced jalapeños for heat; swap smoked paprika for sweet if serving kids.

Skillet = serving dish

An enamel-coated cast-iron pan travels from stove to oven to table, keeping the casserole warmer longer and looking rustic-chic.

Variations to Try

Bacon-Ranch: Stir in ½ cup crumbled cooked bacon and 1 tsp ranch seasoning into the sauce. Top with chopped green onions.
Mexi-Cheddar: Swap cheddar for pepper jack, add 1 tsp cumin and 1 cup diced bell pepper sautéed with onion. Serve with cilantro and a dollop of sour cream.
Veggie Boost: Replace half the broccoli with cauliflower florets or zucchini half-moons. Roast 5 minutes first to remove moisture.
Seafood Spinach: Substitute 1 lb shrimp or canned salmon for chicken and fold in 1 cup thawed, squeezed-dry chopped spinach.
Nut-Free Crust: If pork rinds aren’t your thing, use ¼ cup blanched slivered almonds tossed with 1 tsp butter and a pinch of salt.

Storage Tips

Refrigerate: Cool completely, transfer to an airtight container, and refrigerate up to 4 days. Reheat single portions in the microwave 60–90 seconds, covered, or warm the entire casserole at 325 °F (160 °C) for 15 minutes with foil to prevent over-browning.

Freeze: Portion into freezer-safe containers or zip bags (press out air) and freeze up to 3 months. Thaw overnight in the fridge, then reheat gently with a splash of cream to loosen the sauce.

Make-ahead: Assemble through Step 6, cover tightly, and refrigerate up to 24 hours. Add 5 minutes to the bake time if starting cold from the fridge.