I’ll never forget the first time I made this. It was one of those chaotic Thanksgiving mornings, Shaym here, by the way, and I realized I’d forgotten the marshmallows. Total disaster, right? Instead of panicking, I reached into the pantry, pulled out oats, brown sugar, and butter, and whipped together a quick crumble topping.
When I brought it out of the oven, bubbling, golden, and crispy on top, no one missed the marshmallows. Not even a little. In fact, someone actually asked for the “crunchy sweet potato pie.” And just like that, this Sweet Potato Casserole with Crumble Topping became a forever dish in our Thanksgiving spread.
Why You’ll Love Sweet Potato Casserole with Crumble Topping
This dish takes everything you love about traditional Thanksgiving food sides and adds irresistible texture. You get creamy, cinnamon-spiced sweet potatoes and a buttery oat crumble topping that bakes up golden and crisp. It’s the perfect balance of savory and sweet, plus it’s naturally gluten-free if you use GF oats.
It’s ideal for Friendsgiving food ideas, potlucks, or as a twist on classic Thanksgiving recipes side dishes. Even folks who “don’t like sweet potatoes” come back for seconds.
If you’re building a cozy fall meal, try pairing it with our Air Fryer Carrots Recipe or keep it classic with this Sweet Potato in Air Fryer – Better Way recipe. Both bring color and crunch to your Thanksgiving menu ideas.
Ingredients
For the sweet potato base:
- 3 lbs sweet potatoes, peeled and chopped
- ½ cup brown sugar
- ¼ cup unsalted butter, melted
- 2 large eggs
- ½ cup milk (or almond milk)
- 1 tsp vanilla extract
- 1 tsp cinnamon
- ½ tsp nutmeg
- ½ tsp salt
For the crumble topping:
- ½ cup rolled oats
- ½ cup brown sugar
- ⅓ cup flour (or oat flour)
- ¼ cup chopped pecans (optional)
- ⅓ cup unsalted butter, cold and cubed
- ½ tsp cinnamon
Instructions
- Preheat Oven
Set your oven to 350°F (175°C). Grease a 9×13-inch casserole dish. - Cook Sweet Potatoes
Place chopped sweet potatoes in a large pot, cover with water, and boil until fork-tender, about 15 minutes. Drain and mash in a large bowl. - Make the Filling
To the mashed sweet potatoes, add brown sugar, butter, eggs, milk, vanilla, cinnamon, nutmeg, and salt. Stir or beat until smooth. - Prepare the Crumble
In another bowl, combine oats, brown sugar, flour, chopped pecans, and cinnamon. Cut in cold butter with a fork until the mixture forms small crumbles. - Assemble & Bake
Spread the sweet potato filling evenly in the baking dish. Sprinkle the crumble topping all over. Bake uncovered for 35–40 minutes, or until the topping is crisp and lightly browned.
Shaym’s Serving Tips
This casserole is a perfect side for roasted turkey or a holiday ham. For smaller fall gatherings, pair it with Beef and Noodles and a leafy autumn salad. It also doubles as a cozy vegetarian entrée!
Planning for leftovers? Lucky you. This keeps well in the fridge for 3–4 days and reheats beautifully at 325°F.