Thanksgiving Casserole Treat

Featured in Family Dinners.

Last year, I made this and now it’s always on our holiday table! Mashed sweet potatoes get super smooth with butter and brown sugar. Then marshmallows and pecans go on top and toast in the oven till golden. My aunt couldn’t stop grabbing bites, and even the kids ate it! That warm, crunchy topping with creamy spuds is irresistible. No complaints from anyone about eating sweet potatoes!
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Updated on Sat, 05 Apr 2025 18:09:41 GMT
A dish filled with creamy sweet potatoes, toasty marshmallows, and crunchy pecans. Pin it
A dish filled with creamy sweet potatoes, toasty marshmallows, and crunchy pecans. | tasteofmoms.com

Grandma's Treasured Orange Spud Delight

Family gatherings at my grandma's cozy kitchen always featured this delightful sweet potato dish. Her tiny cooking space somehow produced the most unforgettable casserole packed with velvety orange spuds, dark sugar, melted butter, and warm spice notes. Nothing beats those crunchy nuts and melty marshmallows creating the perfect topping. I've dished this up at countless family meals and watch faces light up every single time.

The Foolproof Appeal Of This Dish

What's great about this dish is how quickly it comes together. You can get it ready while your main course cooks and it won't empty your wallet. There's something magical about the blend of soft potatoes, crunchy nuts and those perfectly browned marshmallows. My little ones always scramble to grab the edges where the topping gets extra crispy.

Your Ingredient Checklist

  • 3 pounds sweet potatoes: Go for fresh ones but in a rush canned works too (3 big cans does the trick).
  • ½ cup brown sugar: The dark variety adds that deep richness I can't get enough of.
  • ⅓ cup butter: I stick with the salted kind for this dish.
  • ½ teaspoon vanilla extract: Even a tiny bit makes everything taste better.
  • ¾ cup chopped pecans: Keep some for sprinkling on top where they get perfectly toasted.
  • ¼ teaspoon cinnamon: It'll fill your home with the coziest aroma.
  • 2 cups miniature marshmallows: Tiny ones create a better melt than larger marshmallows.
  • Salt and black pepper: Add just enough to bring out the flavors.
A sweet potato mixture topped with golden marshmallows and toasted pecans served in a glass baking dish. Pin it
A sweet potato mixture topped with golden marshmallows and toasted pecans served in a glass baking dish. | tasteofmoms.com

Cooking Steps Made Easy

Setting Up
Crank your oven to 375°F and grease your 9 x 13 dish with butter.
Prepare Your Spuds
Simmer those peeled and diced sweet potatoes in water until they squish easily with a fork around 15 minutes.
Mix It Up
Smash the potatoes and stir in your sugar butter vanilla cinnamon and seasonings until everything looks smooth and combined.
Add Texture
Toss in half the pecans and transfer everything to your prepared dish.
Finishing Touch
Cover the top with your marshmallows and leftover pecans.
Bake Away
Let it cook for about 25 minutes until you get that perfect golden brown topping.

Clever Cooking Tricks

Need to save time? Tackle the potato prep the evening before. I personally enjoy some chunks in my mash though my sister goes for completely smooth with her electric mixer. When nobody's watching I sometimes add a dash of bourbon which brings an amazing depth to the flavor.

Plan-Ahead Pointers

This dish works great made in advance. I often fix the sweet potato mixture a couple days before big events. Just store the topping separately until baking time. Remember to let the potato mix warm up on the counter then bake for 20 minutes before adding toppings and cooking another 15 minutes.

A sweet potato casserole with golden brown marshmallow topping and nuts presented in a transparent baking dish. Pin it
A sweet potato casserole with golden brown marshmallow topping and nuts presented in a transparent baking dish. | tasteofmoms.com

Frequently Asked Questions

→ Can I prep this ahead of time?

Yes, you can prepare it up to two days in advance. Keep the topping separate, and let it warm up on the counter for half an hour before baking.

→ Do I have to add both marshmallows and pecans?

Nope, you can skip one or both! Some folks stick to just pecans or marshmallows.

→ How do I check if the sweet potatoes are boiled enough?

Use a fork to poke them. If they’re soft, they’re good to go! It usually takes about 15 minutes.

→ Why did my marshmallows burn?

Keep an eye on them during the last five minutes! If they’re browning too fast, throw some foil over the dish.

→ Can I cut back on the sugar?

Absolutely! Sweet potatoes are naturally sweet. Start with just half the brown sugar and adjust to taste.

Thanksgiving Casserole

Creamy mashed sweet potatoes mixed with buttery brown sugar, then topped with toasted marshmallows and crunchy pecans for a holiday twist.

Prep Time
20 Minutes
Cook Time
25 Minutes
Total Time
45 Minutes
By: Ashley

Category: Family Dinners

Difficulty: Easy

Cuisine: American

Yield: 16 Servings (1 casserole)

Dietary: Vegetarian, Gluten-Free

Ingredients

01 2 cups of tiny marshmallows.
02 A pinch of salt and some black pepper.
03 1/3 cup of butter, softened.
04 1/2 teaspoon vanilla.
05 1/2 cup of brown sugar, packed tightly.
06 1/4 teaspoon ground cinnamon.
07 3 pounds of sweet potatoes, peeled and cut into cubes.
08 3/4 cup of pecans, chopped up.

Instructions

Step 01

Turn on your oven to 375°F and grease a 9x13 pan.

Step 02

Let the cubed sweet potatoes cook in boiling water for about 15 minutes until soft.

Step 03

Pour out the water so only the cooked potatoes are left.

Step 04

Mix the potatoes with butter, cinnamon, vanilla, brown sugar, salt, and pepper, and mash everything together.

Step 05

Stir in half of the pecans into the mashed mixture.

Step 06

Put the mashed potatoes in the greased dish, smoothing it out evenly.

Step 07

Sprinkle the leftover pecans and marshmallows evenly on top.

Step 08

Pop it in the oven for 25 minutes or until the marshmallows are golden and toasty.

Notes

  1. You can use either dark or light brown sugar.
  2. Prepare this 2 days ahead, but don't add the topping until ready to bake.
  3. If making ahead, leave at room temperature for half an hour before baking.
  4. Use extra salt if your butter isn't salted.

Tools You'll Need

  • Large pot for boiling.
  • Potato masher or fork for mashing.
  • A 9x13 dish for baking.

Allergy Information

Please check ingredients for potential allergens and consult a health professional if in doubt.
  • Contains pecans (tree nuts).
  • Includes dairy from butter.

Nutrition Facts (Per Serving)

It is important to consider this information as approximate and not to use it as definitive health advice.
  • Calories: 188
  • Total Fat: 7 g
  • Total Carbohydrate: 29 g
  • Protein: 1 g