Sweet Pot Casserole Recipe: Marshmallow-Topped Holiday Tradition

This sweet potato casserole brings warmth and tradition to any holiday table with its creamy base and golden marshmallow topping.

The recipe balances simplicity with impressive results. A few basic ingredients transform into a dish that feels special, with a texture that’s both smooth and satisfyingly sweet.

What makes this version stand out is the contrast—soft, spiced sweet potatoes beneath a layer of toasted marshmallows that crisp at the edges. It’s the kind of side that disappears fast.

Perfect for Thanksgiving, Christmas, or any gathering where comfort food is the star. Here’s how to make it.

Ingredients for Sweet Pot Casserole

Basic ingredients transform into a holiday-worthy dish with creamy sweet potatoes and toasted marshmallows.

Sweet potatoes are the foundation here—choose firm, unblemished ones with deep orange flesh for the best flavor and color. Whole Foods or Trader Joe’s typically carry high-quality produce. The evaporated milk adds creaminess without thinning; Carnation is a reliable brand. For the marshmallows, Jet-Puffed miniatures toast evenly and hold their shape better than generic brands.

Out of evaporated milk? Heavy cream reduced by half works in a pinch. No pecans? Walnuts or almonds offer similar crunch. For a gluten-free version, cornstarch at half the amount can replace the flour. The spices are flexible—pumpkin pie spice can substitute for both cinnamon and nutmeg at a one-to-one ratio.

Assemble the casserole up to 24 hours ahead and refrigerate before baking. Leftovers keep 4-5 days in the fridge or freeze for 3 months. Reheat covered to prevent the marshmallows from over-browning.

Step-by-Step Instructions for Sweet Potato Casserole

This method delivers a perfectly balanced casserole with a creamy base and irresistible marshmallow topping.

Step 1: Prepare and Boil the Sweet Potatoes

Peel the 4 lb Sweet Potatoes and cut them into uniform 1-inch pieces. This ensures even cooking throughout the dish. Place the cubed sweet potatoes in a large pot and cover with cold water by about 1 inch.

Bring to a boil over high heat, then reduce to medium and cook for 12-15 minutes until the pieces are tender when pierced with a fork. Be careful not to overcook—they should hold their shape but yield easily to a fork. Drain immediately and return to the pot to allow any excess moisture to evaporate.

Step 2: Create the Sweet Potato Mixture

Preheat your oven to 350°F. In a large mixing bowl, combine the drained sweet potatoes with the 0.5 cup Unsalted Butter, 0.75 cup Light Brown Sugar, 2 tsp Vanilla Extract, 1.5 tsp Ground Cinnamon, 0.5 tsp Ground Nutmeg, and 1 tsp Salt.

Use an electric mixer to beat until smooth. Add the 2 whole Large Eggs, one at a time, mixing well after each addition. Gradually pour in the 1 can Evaporated Milk while continuing to mix. Finally, sprinkle in the 2 tbsp All-Purpose Flour to thicken the mixture slightly. The texture should be creamy but able to hold its shape when spread.

Step 3: Assemble the Casserole

Transfer the sweet potato mixture to a greased 9×13-inch baking dish, spreading it evenly with a spatula. The surface should be smooth but not packed down—this allows the topping to meld beautifully with the base during baking.

Sprinkle the 0.5 cup Pecans evenly over the top, pressing them lightly into the mixture so they adhere. Then distribute the 3 cups Miniature Marshmallows evenly across the surface, creating a complete layer. The marshmallows should cover the entire casserole with minimal gaps.

Step 4: Bake to Perfection

Bake in the preheated oven for 25-30 minutes until the marshmallows are golden brown and slightly puffed. Watch closely during the last 5 minutes—marshmallows can go from perfectly toasted to burned quickly.

The casserole is done when the edges are bubbling slightly and the marshmallow topping has developed a light golden crust. Remove from the oven and let it rest for 5-10 minutes before serving. This brief rest allows the mixture to set slightly, making it easier to serve neat portions that showcase both the creamy filling and the toasted marshmallow topping.

Perfect Pairings for This Recipe

Side Dish Ideas

Balance the sweetness with a crisp green salad—toss 5 oz mixed greens with a tangy balsamic vinaigrette. I love adding candied pecans and crumbled goat cheese for extra texture and contrast. 🥗

Protein Pairings

A savory herb-roasted turkey breast or glazed ham complements the casserole’s sweetness perfectly. For a vegetarian option, sage-infused stuffing adds earthy depth to the meal.

Beverage Matches

A glass of chilled Riesling or sparkling cider cuts through the richness. For coffee lovers, a dark roast with a splash of cream enhances the spiced flavors. 🍷

Holiday Menu

Round out your spread with cornbread muffins and roasted Brussels sprouts. The muffins’ buttery crumb pairs well, while the sprouts’ bitterness balances the dish’s sweetness.

Dessert Transition

Serve with pumpkin pie for a cohesive fall theme. The shared spices—cinnamon and nutmeg—tie both dishes together beautifully. 💫

Frequently Asked Questions