Healthy Sweet Potato Casserole (No Marshmallows, 229 Calories)

A healthy sweet potato casserole starts with a simple question: what is the marshmallow layer actually for? Sweet potatoes are already sweet. Roast them instead of boiling them and that sweetness gets deeper, so the dish needs almost no added sugar.

A three-quarter cup serving of this version comes to about 229 calories and 10 grams of sugar, calculated from the actual ingredients. The classic with a brown sugar filling and a marshmallow top can run over 350 calories and 30 grams of sugar for the same scoop.

That is dessert wearing a side dish costume. If you want to see how a plate like that fits into your actual day, my free calorie calculator shows you your number in about a minute, no guesswork.

Why This Recipe Works

Sweet potatoes are a genuinely good carbohydrate. They bring fiber, potassium, and a lot of vitamin A, and they digest slower than white rolls or stuffing. The problem was never the potato. It was the cup of brown sugar and the bag of marshmallows on top.

Fiber is the number I watch on a holiday plate. Most women I coach get about half of what they need on a normal day, and Thanksgiving is usually worse. A scoop of this casserole adds real fiber, and fiber is what makes a plate feel filling instead of just heavy.

Cutting the sugar also changes how you feel at four in the afternoon. A side dish with 30 grams of sugar hits like a dessert, and then you have actual dessert on top of it. Keeping the sweet potatoes savory-leaning leaves room for a real slice of pie.

A Few Notes on the Ingredients

Sweet potatoes with orange flesh, often labeled yams at the store, are what you want. Pick ones that are similar in size so they roast evenly. Three pounds is about four medium potatoes. Roasting whole takes longer than boiling, but it is hands-off and the flavor is far better.

The egg is what turns mashed sweet potatoes into a casserole. It sets the filling slightly so it holds a scoop instead of sliding around the plate. Add it after the butter has melted in, while the potatoes are warm but not hot.

Maple syrup at two tablespoons for the entire filling is enough when the potatoes are roasted. Taste the mash before you add it. If your potatoes are very sweet, you may want only one tablespoon, and that is a decision you get to make when there is no sugar layer on top.

Pecans and oats make a topping with real crunch, which is what people actually miss when the marshmallows are gone. Chop the pecans by hand so you get some bigger pieces. The tablespoon of brown sugar helps the topping brown and clump, and it is the only sugar in that layer.

Tools That Make This Side Easier

An immersion blender or food processor gives you a smooth sweet potato base in minutes. Here is what I recommend. (As an Amazon Associate I earn from qualifying purchases.)

Ninja 9-Cup Food Processor

Check Price on Amazon

Extra-Large Bamboo Cutting Board

Check Price on Amazon

OXO Good Grips Salad Spinner

Check Price on Amazon

KitchenAid Immersion Blender

Check Price on Amazon

Healthy Sweet Potato Casserole

No ratings yet

Roasted sweet potatoes mashed with a little butter, milk, egg, vanilla, and cinnamon, then baked under a crunchy pecan-oat topping. No marshmallows, and a fraction of the sugar of the classic.

Print Recipe Pin Recipe

Prep Time 20 minutes mins

Cook Time 1 hour hr 15 minutes mins

Servings: 10 servings (about 3/4 cup each)

Course: Side Dish

Cuisine: American

Calories: 229

Ingredients Equipment Method Nutrition Notes

Ingredients

  

1x2x3x?

• 3 lb sweet potatoes
• 2 tbsp butter
• 0.33 cup 2% milk
• 1 large egg
• 2 tbsp pure maple syrup
• 1 tsp vanilla extract
• 1 tsp ground cinnamon
• 0.5 tsp salt
• 0.5 cup pecans
• 0.33 cup rolled oats
• 2 tbsp whole wheat flour
• 1 tbsp brown sugar
• 1.5 tbsp butter
• 0.25 tsp ground cinnamon

Equipment

As an Amazon Associate I earn from qualifying purchases.

• Baking dish
• Sheet pan

Method

 

1. Heat the oven to 400F. Scrub the sweet potatoes, prick each one a few times with a fork, and set them on a foil-lined baking sheet. Roast 45 to 55 minutes, until a knife slides into the center with no resistance. Let them cool 10 minutes.
2. Lower the oven to 350F and grease an 8×8 or 2-quart baking dish.
3. Slip the skins off the sweet potatoes and put the flesh in a large bowl. Mash with a fork or potato masher until mostly smooth; a few small lumps are fine.
4. Stir in 2 tablespoons of butter while the potatoes are still warm so it melts. Add the milk, egg, maple syrup, vanilla, 1 teaspoon cinnamon, and salt and mix until combined. Spread evenly in the baking dish.
5. Make the topping. Chop the pecans roughly. In a small bowl, stir together the pecans, oats, whole wheat flour, brown sugar, and 0.25 teaspoon cinnamon. Cut in the cold 1.5 tablespoons of butter with your fingers until the mixture is crumbly and holds together in small clumps.
6. Scatter the topping evenly over the sweet potatoes.
7. Bake uncovered 25 to 30 minutes, until the topping is golden and the edges are bubbling. If the pecans brown too fast, tent loosely with foil for the last 10 minutes.
8. Let it rest 5 minutes before serving.

Nutrition

Calories: 229kcalCarbohydrates: 35.5gProtein: 4gFat: 8.4gSaturated Fat: 3.2gCholesterol: 27.7mgSodium: 233.9mgPotassium: 524.5mgFiber: 5.2gSugar: 10gVitamin C: 3.3mgCalcium: 67.9mgIron: 1.2mg

Notes

Roasting instead of boiling keeps the potatoes dry and concentrates their sweetness, which is why this needs so little added sugar. Nutrition is calculated per serving from the listed ingredients and may vary with brands and substitutions.

Made this recipe?

Tap a star below to rate it. A written review is optional, but I read every one.

Make It Your Own

• Lower carb: replace one pound of the sweet potatoes with roasted butternut squash or cauliflower. The color stays orange and the carbs per serving drop noticeably.
• Protein boost: stir a half cup of plain nonfat Greek yogurt into the mash in place of the milk. It adds protein and a slight tang that works with the cinnamon.
• No added sugar: skip the maple syrup entirely and use a teaspoon of orange zest in the filling. Leave the brown sugar out of the topping and add a pinch more cinnamon.
• Dairy-free: use coconut oil in place of the butter and unsweetened almond milk. The topping crisps just as well.
• Savory version: drop the maple syrup, vanilla, and cinnamon, and add a teaspoon of chopped fresh rosemary and a pinch of black pepper to the mash. Keep the pecan topping.

Storage, Leftovers, and Serving

This is a great make-ahead dish. Assemble the filling in the baking dish up to two days before, cover, and refrigerate. Keep the topping in a separate container. On the day, scatter the topping over the cold filling and bake at 350F for 35 to 40 minutes, since it starts cold.

Leftovers keep 4 days in the fridge. Reheat in the oven at 350F to keep the topping crisp, or in the microwave if you do not mind it soft. The filling alone freezes for 2 months; thaw it overnight in the fridge and add a fresh topping before baking.

This is one of the sides in my Healthy Thanksgiving Guide, which lays out the calorie math of a typical plate and how to build a lighter one without skipping anything you love. It sits next to the cauliflower mashed potatoes and the green bean casserole, with the high-protein pumpkin pie for dessert. The rest of the holiday recipes live there too.

Frequently Asked Questions

Your This-Week Plan

Roast a batch of sweet potatoes this week and make a half recipe of this on a weeknight. You will find out how sweet your potatoes are, whether you want the full two tablespoons of maple syrup, and how long the topping takes to brown. On the holiday it becomes the easy dish.

This article is for general education and isn’t medical or nutrition advice. Nutrition values are calculated from the listed ingredients and will vary with brands and substitutions. If you have a health condition, food allergy, or take medication, please check with your doctor or a registered dietitian before changing how you eat.