Brown Butter Maple Sweet Potato Casserole with Crunchy Pecan Topping
A balanced twist on the classic Southern favorite creamy mashed sweet potatoes infused with browned butter and pure maple syrup, finished with a crunchy pecan-oat topping. Lightened with Greek yogurt and almond milk for a silky texture without excess sugar. Perfect as a year-round side or cozy brunch bake.
Equipment
- Large pot for boiling or roasting sheet
- Small saucepan (for browning butter)
- 8x10-inch (20x25 cm) ceramic or oven-safe baking dish
- Potato masher or hand mixer
- Heatproof silicone spatula
- Measuring cups and spoons
Ingredients
Sweet Potato Base
- 4 large sweet potatoes (about 4 lb / 1.8 kg), peeled and cubed
- 3 tbsp unsalted butter melted
- 2 tbsp browned butter (see directions)
- ⅓ cup (80 ml) pure maple syrup
- ¼ cup(60 g) Greek yogurt (or plain yogurt / dairy-free yogurt)
- ½ cup (120 ml) unsweetened almond milk (or milk of choice)
- 1 tsp vanilla extract
- ½ tsp ground cinnamon
- ¼ tsp ground nutmeg
- ⅛ pinch of sea salt
Crunchy Pecan Topping
- 1 cup (100 g) pecan halves roughly chopped
- 2 tbsp melted butter (reserve 2 tbsp of the browned butter if desired)
- 2 tbsp pure maple syrup
- ¼ cup (30 g) oat flour (sub: almond flour or ground oats)
- 2 tbsp light brown sugar or coconut sugar
- Pinch of salt
Optional Garnish
- Extra chopped pecans
- Warm maple syrup for drizzling
Instructions
Preheat & prep (2–3 minutes):
- Preheat your oven to 350°F (175°C). Lightly grease an 8x10-inch baking dish and set aside.
Cook sweet potatoes (15–20 minutes):
- Peel and cube the sweet potatoes into uniform pieces. Place in a large pot, cover with cold water, add a pinch of salt, and bring to a boil. Cook until fork-tender, about 15-20 minutes. Drain well and allow to cool slightly.
Brown the butter (4–6 minutes):
- In a small saucepan over medium heat, melt 5 tbsp unsalted butter. Swirl the pan frequently as the butter foams and then begins to brown. Watch for amber color and nutty aroma once brown flecks appear, remove from heat. Reserve 2 tbsp of the browned butter for the sweet potato base (and optionally use remaining for the topping).
Mash the potatoes (3-5 minutes):
- Transfer cooked sweet potatoes to a large bowl. Mash until mostly smooth using a potato masher or use a hand mixer for a silkier texture.
Combine base ingredients (2-3 minutes):
- To the mashed potatoes add 1/3 cup maple syrup, 1/4 cup Greek yogurt, 1/2 cup almond milk, 1 tsp vanilla extract, 1/2 tsp cinnamon, 1/4 tsp nutmeg, a pinch of sea salt, and the 2 tbsp browned butter. Stir until fully combined and creamy. Taste and adjust sweetness add up to 1 additional tbsp maple syrup if needed.
Make the pecan topping (3–4 minutes):
- In a medium bowl, combine chopped pecans, 2 tbsp melted butter, 2 tbsp maple syrup, 1/4 cup oat flour, 2 tbsp brown sugar, and a pinch of salt. Mix until crumbly and slightly sticky; it should clump when pressed between fingers.
Assemble (2 minutes):
- Spread the sweet potato mixture evenly into the prepared baking dish. Evenly scatter the pecan topping over the surface, pressing lightly so it adheres.
Bake (25–30 minutes):
- Bake at 350°F (175°C) for 25-30 minutes, until the topping is golden-brown and the edges bubble gently.
Rest & serve (10–15 minutes):
- Remove from oven and let rest for 10-15 minutes to set. Garnish with extra chopped pecans and a light drizzle of maple syrup if desired. Serve warm.
Notes
- Brown butter timing: Butter can go from brown to burnt quickly. Remove it from heat as soon as it smells nutty and you see small brown flecks.
- Sweetness adjust: Sweet potato natural sugar varies taste before adding extra maple syrup. Add 1 tbsp at a time to avoid oversweetening.
- Texture variations: For chunkier texture, mash less. For ultra-smooth, use a hand mixer or food mill.
- Substitutions: Use coconut yogurt to make dairy-free; almond or oat milk works fine. Substitute almond flour for oat flour for a nuttier topping.
- Add-ins: A splash (1-2 tsp) of bourbon or a teaspoon of orange zest brightens the flavour.
Make-Ahead & Storage
- Make-ahead: Assemble the casserole, cover tightly, and refrigerate for up to 24 hours. Bake directly from cold, adding 5-10 minutes to baking time if needed.
- Refrigerate: Store leftovers in an airtight container for up to 4 days. Reheat in a 350°F (175°C) oven for 10-15 minutes to re-crisp topping.
- Freeze: Cool completely, wrap the dish tightly in plastic wrap and foil, and freeze up to 2 months. Thaw overnight in the fridge and bake at 350°F for ~20 minutes until heated through.