Homemade Keto Scalloped Potatoes

I’ll be honest—when I first went keto, I thought scalloped potatoes were off the table forever. Potatoes are basically carb bombs, and regular scalloped potatoes can pack in over 30 grams of carbs per serving. That’s your whole day’s worth if you’re trying to stay in ketosis.

But here’s the thing: rutabaga changes everything. I know, I know—it sounds like a weird vegetable your grandma might have eaten during the Depression. But when you slice it thin and bake it in a creamy, cheesy sauce, it tastes pretty close to the real deal. My kids didn’t even notice I’d swapped it in until I told them, and by then they’d already gone back for seconds.

What Kind of Rutabaga Should I Use?

When shopping for rutabaga, look for ones that feel heavy for their size and have smooth, firm skin without any soft spots or major blemishes. Smaller to medium-sized rutabagas tend to be sweeter and less woody than the really large ones, so keep that in mind when you’re at the store. You’ll want to peel the rutabaga thoroughly since the skin is pretty thick and waxy – a sharp vegetable peeler or knife works best for this job. Once peeled, slice your rutabaga as thinly and evenly as possible so all the pieces cook at the same rate in your scalloped potato dish.

Options for Substitutions

This keto-friendly dish has some room for swaps if you need them:

• Rutabaga: This is the key to keeping this dish keto, so I wouldn’t swap it out if you’re sticking to low-carb. However, turnips work similarly and have a comparable carb count. Regular potatoes will make it taste more traditional but won’t be keto anymore.
• Monterey jack cheese: You can use cheddar, gruyere, or mozzarella instead. Each will give you a slightly different flavor – cheddar is sharper, gruyere is nuttier, and mozzarella is milder.
• Cream cheese: If you’re out of cream cheese, add an extra 2 tablespoons of butter and increase the heavy cream by 2 tablespoons to maintain that rich, creamy texture.
• Chicken broth: Vegetable broth or beef broth both work fine here. You could even use water in a pinch, though you’ll lose some depth of flavor.
• Heavy cream: Half-and-half can work if that’s what you have, though the sauce won’t be quite as thick. You might need to add a bit more cream cheese to compensate.
• Dill: Fresh or dried dill both work. If using dried, cut the amount in half. You can also swap it for thyme or parsley if you prefer different herbs.

Watch Out for These Mistakes While Baking

The biggest mistake when making keto scalloped potatoes is cutting your rutabaga slices too thick, which will leave you with crunchy, undercooked pieces – aim for slices about 1/8 inch thick using a mandoline or sharp knife for even cooking.

Another common error is not letting your cream sauce simmer long enough, so make sure it thickens slightly and the cream cheese is completely melted before pouring it over the rutabaga, otherwise you’ll end up with a watery casserole.

Don’t skip covering the pan with foil for the first 30 minutes of baking, as this traps steam and helps the rutabaga cook through properly – then remove the foil for the last 10-15 minutes to get that golden, bubbly cheese on top.

Finally, resist the urge to dig in right away and let the casserole rest for at least 10 minutes after baking, which allows the sauce to thicken up and makes it much easier to serve neat portions.

What to Serve With Keto Scalloped Potatoes?

These scalloped potatoes are rich and creamy, so they pair perfectly with simple proteins like grilled chicken, pan-seared pork chops, or a juicy steak. I love serving them alongside roasted vegetables like Brussels sprouts or green beans to add some freshness to the plate. If you’re keeping things keto, a crisp Caesar salad (without croutons) makes a great side that won’t weigh you down. For a complete dinner, try pairing them with baked salmon or herb-roasted turkey breast, which both complement the creamy, garlicky flavors really well.

Storage Instructions

Store: Keep your scalloped rutabaga in an airtight container in the fridge for up to 4 days. The flavors actually get even better the next day as everything melds together, so this is a great make-ahead side dish for busy weeknights or meal prep.

Freeze: You can freeze this dish for up to 2 months, though the texture might be slightly softer when thawed. Let it cool completely, then wrap tightly in plastic wrap and aluminum foil, or store in a freezer-safe container. Thaw overnight in the fridge before reheating.

Reheat: Warm it up in the oven at 350°F covered with foil until heated through, about 20-25 minutes. You can also microwave individual portions, but the oven keeps that nice creamy texture better. If it seems a bit dry, add a splash of cream or broth before reheating.

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 1100-1250
• Protein: 35-45 g
• Fat: 90-105 g
• Carbohydrates: 45-55 g

Ingredients

For the base:

• 4 cups rutabaga (peeled and sliced into 1/8-inch rounds)
• 2 tbsp olive oil (I prefer Bertolli Extra Virgin for roasting)
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1.5 tsp garlic powder
• 1.5 tsp onion powder

For the cheese sauce:

• 2 tbsp butter (I like Kerrygold unsalted butter for this)
• 2 oz cream cheese (softened to room temperature, about 70°F)
• 1/2 cup chicken broth
• 3/4 cup parmesan cheese
• 3/4 cup heavy cream

For the topping:

• 1.5 cups monterey jack cheese (freshly shredded for better melting)
• 1 tbsp fresh dill

Step 1: Prepare Mise en Place and Preheat

• 4 cups rutabaga
• 2 oz cream cheese
• 1.5 cups monterey jack cheese

Peel and slice the rutabaga into 1/8-inch rounds—a mandoline slicer makes this quick and consistent.

Soften the cream cheese to room temperature (about 70°F) so it incorporates smoothly into the sauce without lumps.

Shred the Monterey Jack cheese fresh rather than using pre-shredded, as it melts more evenly and creates a creamier sauce.

Preheat your oven to 375°F and lightly grease a 9×13 inch baking dish or similar size with butter or oil.

Step 2: Season the Rutabaga

• 4 cups rutabaga
• 2 tbsp olive oil
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1.5 tsp garlic powder
• 1.5 tsp onion powder

In a large bowl, toss the sliced rutabaga with the olive oil, salt, black pepper, garlic powder, and onion powder until every slice is evenly coated.

The seasoning at this stage builds flavor throughout the dish rather than relying solely on the sauce, which gives you more depth and control over the final taste.

Step 3: Build the Cream Sauce

• 2 tbsp butter
• 2 oz cream cheese
• 1/2 cup chicken broth
• 3/4 cup heavy cream
• 3/4 cup parmesan cheese

In a pot over medium heat, melt the butter, then add the softened cream cheese and whisk constantly for about 1 minute until smooth and combined.

Pour in the chicken broth and heavy cream, stirring gently to avoid lumps.

Add the parmesan cheese and simmer for about 5 minutes, stirring occasionally—this allows the sauce to emulsify and develop a silky, cohesive texture.

I like to taste the sauce at this point and adjust the seasoning if needed; a pinch of salt or white pepper can make a big difference.

Step 4: Layer and Assemble the Casserole

• seasoned rutabaga from Step 2
• cream sauce from Step 3
• 1.5 cups monterey jack cheese

Spread the seasoned rutabaga slices from Step 2 into the prepared baking dish in an even layer.

Pour the warm cream sauce from Step 3 over the rutabaga, making sure to coat all the slices evenly.

The sauce should come about halfway up the vegetables—this helps them cook through while staying tender.

Sprinkle the freshly shredded Monterey Jack cheese from Step 1 evenly over the top.

Step 5: Bake Until Golden and Tender

Bake uncovered at 375°F for 40-45 minutes, until the top is golden brown and the rutabaga is fork-tender.

The cheese should bubble slightly at the edges and the sauce should thicken as it bakes.

If the top is browning too quickly before the vegetables are tender, you can loosely tent with foil for the last 10-15 minutes.

Let the casserole rest for 5 minutes after removing from the oven so the sauce sets slightly and becomes easier to serve.

Step 6: Finish and Serve

• 1 tbsp fresh dill

Sprinkle the fresh dill over the hot casserole just before serving for a bright, herbaceous finish.

The dill cuts through the richness of the cream and cheese perfectly without overwhelming the delicate flavor of the rutabaga.

Homemade Keto Scalloped Potatoes

Delicious Homemade Keto Scalloped Potatoes recipe with step-by-step instructions.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 45 minutes mins

Total Time 1 hour hr 7 minutes mins

Servings 6 servings

Calories 1175 kcal

Ingredients

  

For the base::

• 4 cups rutabaga (peeled and sliced into 1/8-inch rounds)
• 2 tbsp olive oil (I prefer Bertolli Extra Virgin for roasting)
• 1/2 tsp salt
• 1/2 tsp black pepper
• 1.5 tsp garlic powder
• 1.5 tsp onion powder

For the cheese sauce::

• 2 tbsp butter (I like Kerrygold unsalted butter for this)
• 2 oz cream cheese (softened to room temperature, about 70°F)
• 1/2 cup chicken broth
• 3/4 cup parmesan cheese
• 3/4 cup heavy cream

For the topping::

• 1.5 cups monterey jack cheese (freshly shredded for better melting)
• 1 tbsp fresh dill

Instructions

 

• Peel and slice the rutabaga into 1/8-inch rounds—a mandoline slicer makes this quick and consistent. Soften the cream cheese to room temperature (about 70°F) so it incorporates smoothly into the sauce without lumps. Shred the Monterey Jack cheese fresh rather than using pre-shredded, as it melts more evenly and creates a creamier sauce. Preheat your oven to 375°F and lightly grease a 9x13 inch baking dish or similar size with butter or oil.
• In a large bowl, toss the sliced rutabaga with the olive oil, salt, black pepper, garlic powder, and onion powder until every slice is evenly coated. The seasoning at this stage builds flavor throughout the dish rather than relying solely on the sauce, which gives you more depth and control over the final taste.
• In a pot over medium heat, melt the butter, then add the softened cream cheese and whisk constantly for about 1 minute until smooth and combined. Pour in the chicken broth and heavy cream, stirring gently to avoid lumps. Add the parmesan cheese and simmer for about 5 minutes, stirring occasionally—this allows the sauce to emulsify and develop a silky, cohesive texture. I like to taste the sauce at this point and adjust the seasoning if needed; a pinch of salt or white pepper can make a big difference.
• Spread the seasoned rutabaga slices from Step 2 into the prepared baking dish in an even layer. Pour the warm cream sauce from Step 3 over the rutabaga, making sure to coat all the slices evenly. The sauce should come about halfway up the vegetables—this helps them cook through while staying tender. Sprinkle the freshly shredded Monterey Jack cheese from Step 1 evenly over the top.
• Bake uncovered at 375°F for 40-45 minutes, until the top is golden brown and the rutabaga is fork-tender. The cheese should bubble slightly at the edges and the sauce should thicken as it bakes. If the top is browning too quickly before the vegetables are tender, you can loosely tent with foil for the last 10-15 minutes. Let the casserole rest for 5 minutes after removing from the oven so the sauce sets slightly and becomes easier to serve.
• Sprinkle the fresh dill over the hot casserole just before serving for a bright, herbaceous finish. The dill cuts through the richness of the cream and cheese perfectly without overwhelming the delicate flavor of the rutabaga.