Crockpot Sweet Potato Casserole with Pecan Streusel Topping
This crockpot sweet potato casserole is the one Thanksgiving dish that never fights for the oven. The sweet potatoes cook all afternoon in the slow cooker and come out as a creamy orange mash under a crunchy pecan streusel. It tastes like dessert and still counts as a side, which is why the kids reach for it first.
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Fresh sweet potatoes cook in a brown sugar and orange juice glaze on high for about 4 hours, then get mashed right in the pot. The sweet potato casserole with pecan topping finish happens on the stove in 10 minutes, so the streusel stays crisp instead of steaming soft under the lid. Keep the cubes at 1 inch and add the topping right before serving.
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Why This Crockpot Sweet Potato Casserole Works
- It frees up the oven. The whole base cooks in the slow cooker.
- The streusel stays crunchy. Toasting the pecan oat streusel in a skillet gives it baked texture without a broiler.
- No marshmallows, by design. The glaze and the pecan topping bring enough sweetness for a side dish.
- It holds on warm. The mashed base sits on warm for an hour, which makes it an easy make ahead Thanksgiving side.
- It feeds a crowd. One 6-quart slow cooker serves 8 to 10.
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Ingredients and Substitutes
- Sweet potatoes. Cut them into even 1-inch cubes so every piece is tender at the same time. I prefer fresh over canned yams for control over texture and moisture; the FAQ covers canned.
- Light brown sugar. In a slow cooker sweet potato casserole it sweetens the glaze and melts into the streusel. Dark brown sugar gives a deeper molasses flavor.
- Orange juice and zest. The juice loosens the glaze so the cubes do not scorch and adds a citrus note that balances the brown sugar and cinnamon. I would keep it over water, zest included.
- Pecans. Chopped pecans make the streusel, and pecan halves on top finish it. Walnuts work as a swap with a slightly different flavor.
- Rolled oats. Oats give the streusel a nubbly crunch that flour alone does not, so I would not leave them out. Use certified gluten-free oats and a 1-to-1 flour blend to make the dish gluten free.
- Butter and milk. Butter carries the glaze and binds the streusel; milk makes the mash creamy. For a dairy free version, use plant-based butter and oat milk in both.
Notes From Making This in the Slow Cooker
These are the things that mattered most when I worked out how to make crockpot sweet potato casserole in a 6-quart slow cooker. The cubes were tender between 3½ and 4 hours on high. I started checking at 3½ hours because the edges go darker if they cook too long.
Some liquid collected at the bottom. I spooned it off down to about ¼ cup before mashing, which kept the casserole thick and creamy. A potato masher in the pot gave me a smooth mash with a little texture, and after the milk went in, it was thick enough to hold the streusel without going runny.
The streusel formed a few large clumps in the skillet, so I broke them up as I stirred and spread it on a plate to cool, which turned it into crumbly golden clusters. It was crunchiest when added right before serving and softened gradually on the warm casserole. For a buffet, keep the streusel in a bowl beside the slow cooker and let people add their own.
Variations on This Slow Cooker Sweet Potato Casserole
- With marshmallows. For sweet potato casserole with marshmallows and pecans, spread mini marshmallows over the mash, cover, and melt on high for 5 minutes, then add the pecan streusel.
- With bourbon. Stir a tablespoon of bourbon into the glaze with the vanilla.
- With apple. Add two peeled, diced apples with the sweet potatoes for a sweet potato and apple casserole.
- Lower sugar. Halve the brown sugar in the glaze; the orange juice and streusel carry enough sweetness.
What to Serve With This Casserole
This sweet potato casserole with pecan topping is a Thanksgiving side dish first, but it belongs on any fall table.
- A slow cooker turkey breast keeps the main course out of the oven too.
- Crockpot green bean casserole is the savory counterpart to all that sweetness.
- Slow cooker creamed corn completes a set of slow cooker sides with zero oven time.
- Make-ahead mashed potatoes cover the people who want both potatoes.
- Sourdough stuffing soaks up any glaze on the plate.
- Pumpkin-shaped dinner rolls look festive next to the orange and brown.
- This list of sweet potato casserole recipes covers marshmallow, pecan, and savory versions.
Crockpot Sweet Potato Casserole FAQs
Yes, canned yams work well. Drain two 29-ounce cans, skip the first cook, and warm them in the slow cooker with the glaze on high for about 1 hour before mashing. Halve the brown sugar, since canned yams are packed in syrup.
The mashed base keeps up to 3 days, which makes this a true make-ahead crockpot side. Cool it in the insert, refrigerate covered, then reheat on high for about 1 hour, stirring once. Make the streusel up to 2 days ahead, stored airtight at room temperature, and add it right before serving.
Yes, without thawing. Add 30-45 minutes on high and spoon off the extra liquid before mashing.
Refrigerate in an airtight container for up to 5 days and reheat in the microwave in 30-second bursts. The streusel loses its crunch overnight, so store it separately.
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Equipment
- 6-quart slow cooker
Ingredients
Sweet potatoes
- Cooking spray
- 4 pounds sweet potatoes peeled and cut into 1-inch cubes
- ¼ cup unsalted butter melted
- ⅓ cup light brown sugar packed
- 2 tablespoons orange juice
- 1 teaspoon orange zest
- 2 teaspoons vanilla extract
- 1 teaspoon ground cinnamon
- ¼ teaspoon ground nutmeg
- ½ teaspoon kosher salt
- ¼ cup whole milk
Pecan oat streusel
- ⅓ cup unsalted butter
- ⅓ cup all-purpose flour
- ¾ cup light brown sugar packed
- ½ teaspoon ground cinnamon
- Pinch kosher salt
- 1 cup pecans chopped, plus extra for garnish
- ¼ cup old-fashioned rolled oats
Instructions
- Spray the slow cooker insert with cooking spray.
- Whisk the melted butter, ⅓ cup of brown sugar, orange juice, orange zest, vanilla, 1 teaspoon of cinnamon, nutmeg, and ½ teaspoon of salt together in a large bowl.
- Add the sweet potato cubes and toss for 1 minute until evenly coated. Transfer the sweet potatoes and all of the glaze to the slow cooker.
- Cover and cook on high for 3½-4 hours (or on low for 7-8 hours) until a fork slides through a cube with no resistance.
- Spoon off any liquid beyond about ¼ cup from the bottom of the slow cooker.
- Mash the sweet potatoes in the slow cooker with a potato masher until smooth. Stir in the milk, smooth the top, and replace the lid.
- Melt ⅓ cup of butter in a large skillet over medium heat.
- Stir in the flour, ¾ cup of brown sugar, ½ teaspoon of cinnamon, and a pinch of salt for 1 minute until a thick, crumbly paste forms.
- Add the pecans and oats and cook for 4-5 minutes, stirring often, until golden and fragrant. Spread the streusel on a plate and cool for 5 minutes so it crisps.
- Scatter the streusel over the sweet potatoes and top with pecan halves. Serve right away, or keep the casserole on warm for up to 30 minutes with the streusel on top.
Notes
- Check early. Slow cookers vary, so test a cube at 3½ hours and cook longer if needed. The edges darken if it goes too long.
- Holding on a buffet. The streusel softens after about 30 minutes. For a long hold, keep the mashed base on warm for up to 1 hour and serve the streusel from a bowl alongside.
- Make ahead. Refrigerate the mashed base in the insert for up to 3 days and reheat on high for about 1 hour. Store the streusel airtight at room temperature for up to 2 days.
- Canned yams. Use two drained 29-ounce cans, halve the brown sugar in the glaze, and warm on high for 1 hour before mashing.
- Leftovers. Refrigerate for up to 5 days and reheat in the microwave in 30-second bursts.