Candied Sweet Potato Casserole Recipe With Marshmallows: Golden Topping Over Spiced Sweetness

This candied sweet potato casserole delivers a perfect balance of spiced sweetness and gooey marshmallow topping that’s become a holiday staple.

The secret lies in layering tender sweet potatoes with a buttery brown sugar mixture, then crowning it with a golden marshmallow crust that browns beautifully in the oven.

I’ve refined this recipe over years of family gatherings, ensuring the potatoes cook through without drying out while the topping achieves that ideal crispness.

Serve this dish alongside roasted meats or as a standalone vegetarian centerpiece—it’s guaranteed to be the first thing gone from the table.

Ingredients for Candied Sweet Potato Casserole Recipe with Marshmallows

Pantry staples meet holiday magic with these carefully chosen ingredients for a timeless casserole.

The sweet potatoes are the foundation—choose firm, unblemished ones with deep orange flesh for the best texture and flavor. Whole Foods and local farmers markets often carry organic varieties that shine here. For the brown sugar, Domino or C&H brands deliver consistent quality. The butter should be high-fat (at least 80%) for the richest sauce, and I prefer Plugrá or Kerrygold for their superior taste.

No pecans? Walnuts or almonds work just as well—toast them first for extra depth. Short on marshmallows? Large ones cut in half can substitute, but minis melt more evenly. If avoiding dairy, swap the heavy cream for coconut cream (the canned, full-fat kind). The vanilla extract can be bourbon vanilla for complexity, but pure extract is non-negotiable—imitation lacks depth.

Assemble the casserole up to a day ahead—store covered in the fridge. Bake within 24 hours for best results. Leftovers keep 4-5 days refrigerated and reheat beautifully. The marshmallow topping softens upon storage, but a quick broil restores its golden finish.

Step-by-Step Instructions for Candied Sweet Potato Casserole

Master the technique for perfectly balanced sweetness with a golden marshmallow topping.

Step 1: Prepare and Parboil the Sweet Potatoes

Peel the 4 lb Sweet Potatoes and cut them into even 1-inch cubes to ensure uniform cooking. This size allows them to soften evenly without turning to mush during the parboiling process.

Place the cubed sweet potatoes in a large pot of salted boiling water and cook for 8-10 minutes until they are just tender when pierced with a fork but still hold their shape. Drain immediately and transfer to a large mixing bowl to prevent overcooking.

Step 2: Create the Spiced Brown Sugar Sauce

In a saucepan over medium heat, melt the 0.75 cup Unsalted Butter. Add the 1.5 cups Light Brown Sugar, 2 tsp Ground Cinnamon, 0.5 tsp Ground Nutmeg, 1 tsp Vanilla Extract, and 1 tsp Kosher Salt. Stir constantly for 3-4 minutes until the mixture is smooth and slightly thickened.

Remove from heat and stir in the 0.25 cup Heavy Cream and 1 tbsp Orange Zest. The sauce should be glossy and fragrant. Pour this warm sauce over the parboiled sweet potatoes and fold gently to coat every piece evenly without breaking them.

Step 3: Thicken and Transfer to Baking Dish

Sprinkle the 2 tbsp All-Purpose Flour over the sweet potato mixture and fold again until the sauce begins to thicken slightly. This step ensures the casserole sets properly rather than remaining soupy.

Transfer the mixture to a greased 9×13-inch baking dish, spreading it into an even layer. The dish should be about three-quarters full to allow room for the topping.

Step 4: Add the Toppings and Bake

Sprinkle the 1 cup Pecans evenly over the sweet potato mixture, pressing them lightly into the sauce so they adhere. Then distribute the 10 oz Mini Marshmallows in an even layer across the top, covering the pecans completely.

Bake in a preheated 375°F oven for 20-25 minutes until the marshmallows are golden brown and slightly puffed, with some edges beginning to caramelize. Watch closely during the final 5 minutes to prevent burning.

Step 5: Rest and Serve

Remove the casserole from the oven and let it rest for 10 minutes before serving. This allows the sauce to set slightly and makes portioning easier.

Serve warm, scooping generous portions to include the caramelized marshmallow topping and spiced sweet potatoes beneath. The contrast of textures—creamy potatoes, crunchy pecans, and gooey marshmallows—creates the perfect bite.

Pro Cooking Tips for This Dish

Even Cube Cutting

Cut your 4 lb sweet potatoes into precise 1-inch cubes for uniform cooking. This size ensures they soften perfectly during parboiling without turning mushy. I use a ruler to check my first few cuts.

Sauce Consistency Check

When making the brown sugar sauce, cook it until it coats the back of a spoon. If it’s too thin, add 1 tsp cornstarch mixed with water. The sauce should be thick enough to cling to the potatoes but not gluey.

Layering Technique

Press the 1 cup pecans lightly into the sweet potato mixture before adding marshmallows. This prevents them from floating to the top during baking. I find a fork works better than a spoon for this.

Baking Observation

Start checking the casserole at 18 minutes – marshmallows can go from golden to burnt quickly. Rotate the dish 180 degrees halfway through for even browning. My oven has hot spots, so this step is crucial. 🔥

Resting Importance

Let the casserole rest for the full 10 minutes before serving. This allows the sauce to thicken slightly and makes serving neater. The marshmallow topping will firm up just enough to hold its shape.

Crispy Top Tip

For extra crunch, broil for 1-2 minutes at the end of baking. Watch constantly – marshmallows can burn in seconds under the broiler. This trick always impresses my holiday guests.

Frequently Asked Questions