How to Make Perfect Sweet Potato Casserole with Marshmallows

The BEST Sweet Potato Casserole with Marshmallows

Sweet potato casserole has long been a cherished dish at American holiday tables, particularly during Thanksgiving and Christmas. Its origins can be traced back to the early 20th century, when recipes incorporating sweet potatoes and marshmallows began appearing in cookbooks. 

This combination of earthy root vegetables and sweet, pillowy marshmallows quickly gained popularity and has since become a classic side dish — a symbol of indulgence and comfort to share with loved ones. 

But why is it such a holiday favorite? Its appeal lies in its ability to blend rich flavors with nostalgia, providing both a hearty companion to roasted turkey and a touch of dessert-like sweetness. Add in the versatility of sweet potato casserole to adapt to dietary needs and personal tastes, and it’s no wonder this dish has become a festive staple! 

With this guide, you’ll master a simple yet flavorful recipe, discover ways to customize it, and learn how to turn your sweet potato casserole into the show-stopping centerpiece at your next holiday gathering. 

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The Perfect Sweet Potato Casserole With Marshmallows Recipe 

Ingredients 

To create the classic sweet potato casserole with marshmallows, you’ll need the following ingredients (serves 6–8): 

• 4–5 medium sweet potatoes (about 3 pounds), peeled and chopped 
• ½ cup unsalted butter, melted 
• ½ cup granulated sugar (or brown sugar for a richer flavor) 
• ½ cup whole milk (or plant-based milk for a vegan version) 
• 2 large eggs, lightly beaten 
• 1 teaspoon vanilla extract 
• ½ teaspoon ground cinnamon 
• ¼ teaspoon nutmeg 
• ¼ teaspoon salt 
• 1 ½ cups mini marshmallows 

For delicious broccoli cheese casserole, we use Breville BOV845BSS Smart Oven Pro.

Instructions 

1. Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish. 
2. Boil the sweet potatoes in a large pot of salted water until tender (about 15–20 minutes). Drain and mash them in a large bowl. 
3. Mix in mashed sweet potatoes with the melted butter, sugar, milk, eggs, vanilla extract, cinnamon, nutmeg, and salt. Blend until smooth and creamy. 
4. Transfer the mixture to the prepared baking dish, spreading it evenly. 
5. Top with marshmallows, arranging them in a single layer. 
6. Bake for 25–30 minutes, or until the marshmallows are golden brown and the casserole is heated through. 
7. Serve warm and enjoy! 

 Tips for Success 

• Choose sweet potatoes that are uniform in size for even cooking. Their skin should be smooth and blemish-free. 
• For vegans or those with dietary restrictions, replace butter with a plant-based alternative, use almond or oat milk, and substitute eggs with flaxseed meal (1 tablespoon of flaxseed meal mixed with 2.5 tablespoons of water for each egg). 
• If you prefer a less sweet casserole, reduce the sugar to ⅓ cup or use maple syrup as a natural sweetener. 

 Making Your Casserole Stand Out 

Creative Topping Ideas 

While marshmallows are the traditional choice, you can experiment with these other toppings to improve the appearance and flavor profile of your dish: 

• Crunchy Pecan Streusel: Mix chopped pecans, brown sugar, flour, and melted butter for a nutty, sweet crunch. 
• Caramelized Bananas: Slice bananas and cook in butter, brown sugar, and a splash of rum for a unique fruity twist. 
• Granola: Sprinkle granola for an extra-crispy, wholesome option. Perfect if you’re going for a less sugary version. 
• Savory Twist: Swap the marshmallows for a topping of Parmesan cheese and breadcrumbs for a completely new flavor direction. 

Unique Flavor Twists 

• Add a splash of orange juice or zest for a vibrant, citrusy note. 
• Mix in a few tablespoons of bourbon for a sophisticated edge. 
• Sprinkle in coconut flakes for a tropical flavor boost. 

For delicious broccoli cheese casserole, we use Breville BOV845BSS Smart Oven Pro.

Serving Suggestions and Pairings 

Pair your sweet potato casserole with these complementary holiday classics to create a perfectly balanced menu: 

• Main Course: Roast turkey, honey-glazed ham, or herb-crusted tofu (for plant-based eaters). 
• Sides: Green beans with almonds, cranberry sauce, and stuffing. 
• Drinks: Pair with a glass of spiced apple cider, mulled wine, or even a lightly chilled Riesling. 

To elevate your casserole’s presentation, use a decorative baking dish or garnish the marshmallows with a light dusting of cinnamon. Serve it right out of the oven for that irresistible gooey texture. 

Health Benefits of Sweet Potatoes 

Sweet potatoes are more than just delicious—these versatile root vegetables are also packed with nutrients that make them a wholesome addition to your holiday feast. 

Here’s a nutritional breakdown of sweet potatoes (per 1 medium sweet potato): 

• Fiber: 4 grams to aid digestion and promote gut health. 
• Vitamin A: Provides over 400% of your daily needs, supporting healthy skin and vision. 
• Potassium: 12% of the daily recommended intake, beneficial for heart health and muscle function. 
• Antioxidants: Rich in beta-carotene and other antioxidants, sweet potatoes combat oxidative stress and inflammation in the body. 

Including sweet potatoes in a holiday meal adds both vibrant color and essential nutrients to balance your festive indulgence. 

Read more: Classic Broccoli Cheese Casserole

Bake the Holiday Star of the Show 

Sweet potato casserole with marshmallows is not just a dish—it’s a tradition that brings warmth, nostalgia, and plenty of smiles to the table. With the tips and recipe shared here, you’ll be ready to craft a version that’s uniquely yours. 

Whether you stick to the classic recipe or give it a modern twist, we’d love to hear from you! Leave us a comment below or tag us on social media with your culinary creations.