Tulo

Heart-Healthy Sweet Potato Casserole

A baking dish of mashed sweet potato casserole topped with golden toasted oats and chopped pecans, served in a white ceramic dish.
Photo by Polina Tankilevitch on Pexels

Traditional sweet potato casserole often carries a stick of butter, a cup of sugar, and a marshmallow layer, exactly the combination of saturated fat and added sugar cardiologists point to most often around Thanksgiving. This version gets its sweetness from a modest amount of maple syrup and the sweet potatoes themselves, its richness from a small amount of olive oil and one egg instead of butter and cream, and its topping crunch from oats and pecans instead of melted marshmallows, so it still tastes like a holiday side without the same sugar and saturated fat load.

Prep
20 min
Cook
45 min
Total
65 min
Servings
8

Ingredients

Servings8
  • 3 lbs sweet potatoes, peeled and cubed
  • 3 tbsp extra-virgin olive oil
  • 6 tbsp maple syrup
  • 1 egg egg, large
  • 1 tsp vanilla extract
  • 1 1/2 tsp ground cinnamon
  • 1/4 tsp salt
  • 1/2 cup rolled oats
  • 1/2 cup pecans, chopped

Nutrition per serving

Calories
307
Protein
5g
Carbs
49g
Fat
11g

Based on the recipe as written, one serving. Recalculates if you swap an ingredient above. An estimate only, exact values depend on the specific ingredients used.

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Instructions

  1. 1Preheat the oven to 350°F (175°C). Lightly coat an 8x8-inch baking dish with a bit of the olive oil.
  2. 2Place the cubed sweet potatoes in a large pot, cover with cold water by about an inch, and bring to a boil. Cook 15 to 18 minutes, until fork-tender, then drain thoroughly.
  3. 3Return the drained sweet potatoes to the pot and mash until mostly smooth, some texture is fine.
  4. 4Stir in 2 tablespoons of the olive oil, 1/4 cup of the maple syrup, the egg, vanilla, 1 teaspoon of the cinnamon, and the salt until evenly combined.
  5. 5Spread the sweet potato mixture into the prepared baking dish in an even layer.
  6. 6In a small bowl, combine the oats, pecans, remaining 2 tablespoons maple syrup, remaining 1 tablespoon olive oil, and remaining 1/2 teaspoon cinnamon. Sprinkle evenly over the top.
  7. 7Bake for 25 to 30 minutes, until the topping is golden and the edges are bubbling.
  8. 8Let rest for 10 minutes before serving.
How to Boil Sweet Potatoes

Tips & variations

  • Swap the egg for a flax egg (1 tablespoon ground flaxseed plus 2.5 tablespoons water, rested 5 minutes) to make this fully plant-based.
  • Reduce the maple syrup to a total of 4 tablespoons if the sweet potatoes are already very sweet and orange-fleshed, taste the mash before adding sugar.
  • Stir a tablespoon of orange zest into the mash for brightness without adding any sodium or fat.
  • This same swap logic, less butter, more spice, a crunchy topping instead of a sugary one, works on other Thanksgiving sides cardiologists commonly flag, like green bean casserole made with sauteed mushrooms instead of canned soup and fried onions.

Storage & reheating

Cover and refrigerate leftovers for up to 4 days. Reheat individual portions in the microwave for 60 to 90 seconds, or cover the dish loosely with foil and reheat in a 350°F (175°C) oven for 15 to 20 minutes until warmed through. The topping will soften somewhat on reheating but stays crisp longer if stored separately.

Tips from the Tulo kitchen

  • Roasting the sweet potatoes whole in their skins first, then scooping out the flesh, gives a drier, more concentrated mash than boiling and cuts down on added liquid, though it adds about 45 minutes of oven time.
  • A potato masher leaves more texture than a food processor, which is useful here since the casserole has less fat overall to smooth things out.

FAQ

What Thanksgiving foods do cardiologists say to avoid?

The dishes most often flagged are the ones combining a lot of saturated fat and added sugar in one serving, like candied yams with butter and marshmallows, green bean casserole made with canned cream soup and fried onions, gravy made from pan drippings, and pie with a butter-heavy crust and sweetened whipped cream. It's less about avoiding these foods entirely and more about the portion and how many of them stack up on one plate.

Is sweet potato casserole actually bad for your heart?

The vegetable itself is fine, sweet potatoes are high in fiber and potassium. The concern is the classic preparation, which often adds a stick of butter, a cup of sugar, and a layer of melted marshmallows on top, turning a naturally healthy vegetable into a dessert-level dish.

Can this casserole be made ahead of Thanksgiving Day?

Yes. Assemble the mashed sweet potato layer up to 2 days ahead and refrigerate covered, but wait to add the oat-pecan topping until just before baking so it doesn't turn soggy from sitting on the moist mash.

Can I cut the fat and sugar further?

Yes, replace the egg with 1/4 cup plain Greek yogurt for binding with less fat, and reduce the maple syrup to 3 tablespoons total if serving alongside other sweet dishes like pie.

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