Maple-Spiced Sweet Potato Casserole

When the first cool evenings of fall show up, sweet potato casserole starts to make sense in a whole new way. Creamy sweet potatoes, maple, cinnamon, and a toasted pecan oat topping give this version the cozy, dessert-like character people look forward to at the fall table.

The ingredient list is intentionally pared back and portioned with Low-FODMAP guidance in mind. Lactose-free butter and milk keep the filling creamy, while certified gluten-free oats help make this a gluten-free, lactose-free, gut-friendly fall dessert when prepared as written.

A little orange zest lifts the warm spices, and the pecans add just enough crunch against the soft sweet potato base. Serve it warm after dinner, bring it to a fall gathering, or make the base ahead so the final bake is one less thing to think about.

Ingredients

For the Sweet Potato Filling

• 2 1/2 pounds orange-fleshed sweet potatoes, peeled and cut into 1-inch cubes
• 3 tablespoons lactose-free butter, softened
• 1/4 cup lactose-free milk
• 1/4 cup packed light brown sugar
• 2 tablespoons pure maple syrup
• 1 teaspoon pure vanilla extract
• 1 teaspoon ground cinnamon
• 1/4 teaspoon ground ginger
• 1/8 teaspoon ground nutmeg
• 1 teaspoon finely grated orange zest
• 1/4 teaspoon fine sea salt

For the Pecan Oat Topping

• 1/2 cup chopped pecans
• 1/3 cup certified gluten-free rolled oats
• 2 tablespoons packed light brown sugar
• 1 tablespoon pure maple syrup
• 1 tablespoon lactose-free butter, melted
• 1/2 teaspoon ground cinnamon
• Pinch of fine sea salt

Materials Needed

• Cutting board
• Sharp knife
• Vegetable peeler
• Measuring cups and spoons
• Large pot
• Colander
• Potato masher
• Large mixing bowl
• Small mixing bowl
• 9 x 13-inch baking dish
• Mixing spoon or spatula

How to Make It

1. Preheat the oven. Preheat oven to 375°F. Lightly grease a 9 x 13-inch baking dish with lactose-free butter or a neutral cooking spray.
2. Boil the sweet potatoes. Add the cubed sweet potatoes to a large pot and cover with water. Bring to a boil, then reduce to a steady simmer and cook for 12 to 15 minutes, or until the pieces are fork-tender.
3. Drain them well. Pour the sweet potatoes into a colander and let them sit for 2 to 3 minutes so excess steam can escape. This keeps the casserole creamy instead of watery.
4. Mash the filling. Return the sweet potatoes to the pot or transfer them to a large bowl. Mash with the lactose-free butter, milk, brown sugar, maple syrup, vanilla, cinnamon, ginger, nutmeg, orange zest, and salt until creamy with a little texture remaining.
5. Fill the baking dish. Spoon the sweet potato mixture into the prepared dish and spread it into an even layer.
6. Mix the topping. In a small bowl, stir together the pecans, certified gluten-free oats, brown sugar, maple syrup, melted lactose-free butter, cinnamon, and salt until the mixture is lightly coated.
7. Add the crunch. Scatter the pecan oat mixture evenly over the sweet potatoes, keeping the topping loose rather than pressing it down.
8. Bake until warm and toasted. Bake for 20 to 25 minutes, or until the casserole is hot through and the topping is lightly toasted. Let it rest for 10 minutes before serving.

Low-FODMAP Notes

Serving size matters with sweet potato. This recipe uses about 2 1/2 pounds of sweet potatoes and is written for 16 small servings, which keeps the sweet potato portion close to the commonly referenced Low-FODMAP serving range when divided as written.

Use certified gluten-free rolled oats and check packaged ingredients for gluten-containing additives if gluten-free preparation is important to you. Lactose-free butter and milk keep the recipe lactose-free while preserving the creamy texture expected from a classic casserole.

This recipe is designed with Low-FODMAP-friendly ingredients as a general wellness resource. It is not a substitute for personalized medical or dietary advice, so use the serving size that fits your own needs and guidance.

Recipe Tips

• Cut the sweet potatoes into similar-size pieces so they soften at the same rate.
• Let the drained potatoes steam for a few minutes before mashing to avoid a watery filling.
• Mash by hand if you like a little texture, or work the mixture until smoother for a softer dessert-style finish.
• For make-ahead prep, refrigerate the sweet potato filling and topping separately, then assemble just before baking.
• Divide the finished casserole into 16 small servings if you are using the Low-FODMAP portioning approach in this recipe.
• Let the casserole rest for about 10 minutes so the topping stays crisp when you spoon it out.