Weight Watchers Sweet Potato Casserole Recipe: Crispy Celery Crown Over Creamy Spiced Filling

This Weight Watchers sweet potato casserole delivers all the comforting flavors of a classic dish—crispy celery crown over a creamy spiced filling—without the guilt. After years of perfecting lighter versions for family gatherings, I’ve created a recipe that fits seamlessly into your points plan while still feeling indulgent.

The secret? Using Greek yogurt instead of butter and topping with celery for crunch instead of heavy marshmallows.

The filling gets its velvety texture from mashed sweet potatoes blended with Greek yogurt and warm spices like cinnamon and nutmeg, while the celery topping adds a satisfying crunch without the sugar crash.

It’s the kind of dish that disappears faster than you can say "seconds, please," but with portion control in mind—each serving is balanced and satisfying. The best part? It bakes in just 45 minutes, making it perfect for busy weeknights or holiday meals.

What makes this recipe truly special is how it transforms a traditional comfort food into something Weight Watchers-friendly without sacrificing flavor. The sweet potatoes caramelize beautifully, the celery topping turns golden and crispy, and the spices create a warm, inviting aroma that fills your kitchen.

It’s the kind of casserole that feels like a hug in a dish—just lighter.

Pair it with grilled chicken or turkey for a complete meal, or serve alongside roasted vegetables for a well-rounded plate. The versatility of this recipe means it works for dinner parties, family dinners, or even a cozy night in.

Let’s make a casserole that’s as kind to your waistline as it is to your taste buds.

Ingredients for weight watchers recipe for sweet potato casserole

Sweet potatoes, Greek yogurt, and celery transform into a Weight Watchers-approved comfort dish with crispy crown and creamy filling.

The sweet potatoes are the heart of this dish—organic or heirloom varieties caramelize better, but any orange-fleshed sweet potato works. Trader Joe's and Whole Foods carry the best quality, but regular grocery stores have them too. Look for firm, smooth-skinned potatoes with no soft spots. The Greek yogurt is non-negotiable here—it replaces butter for creaminess while keeping points low. Fage 2% or Siggi's plain are my go-tos, but nonfat works too if you're strict on points. For the celery, fresh, crisp stalks are essential—they should snap when bent, not feel rubbery.

No Greek yogurt? Unsweetened applesauce or mashed cauliflower can stretch it out, though texture changes slightly. Swap brown sugar for maple syrup or coconut sugar if you prefer. The celery crown needs flour to crisp—almond flour works too for a lower-carb version. For extra crunch, pulse the celery in a food processor before baking. The spices? Ceylon cinnamon is gentler than regular, but if you only have cassia, use half the amount. Nutmeg should be freshly grated—pre-ground loses potency fast. Want more warmth? Add a pinch of cardamom to the filling.

Store leftovers in an airtight container for 4-5 days—it reheats beautifully. For make-ahead prep, assemble the casserole and refrigerate overnight before baking. The celery topping stays crispy if baked fresh, but reheating briefly revives it. Freezes well for 3 months—portion into single servings before freezing. This reheats best at 350°F for 10-15 minutes covered with foil. Pair with grilled chicken to make a complete Weight Watchers meal.

Step-by-step instructions for sweet potato casserole

Here's how to create a perfectly balanced dish with tender sweet potatoes and a crispy celery crown.

Preheat your oven to 375°F. In a large mixing bowl, combine the 3 lbs of peeled and cubed sweet potatoes, 1 cup of plain nonfat Greek yogurt, 2 whole large eggs, 0.25 cup of packed light brown sugar, 2 teaspoons of ground cinnamon, 0.5 teaspoon of ground nutmeg, 1 teaspoon of salt-free herbal seasoning, 0.5 teaspoon of salt, and 0.25 teaspoon of freshly cracked black pepper. Use a sturdy spoon or your hands to mix everything thoroughly until the sweet potatoes are evenly coated with the spiced yogurt mixture.

This step is crucial for creating that signature creamy texture. The yogurt adds richness without the heaviness of cream, while the spices develop beautifully during baking. Make sure the sweet potatoes are evenly coated—they'll absorb the flavors as they bake, creating that perfect balance of sweet and spiced.

Transfer the sweet potato mixture to a 9x13-inch baking dish and spread it out evenly. Place the dish on a rimmed baking sheet to catch any potential spills. Bake for 45-50 minutes until the sweet potatoes are tender and the top begins to set slightly. You'll know they're ready when a knife inserted into the center comes out clean with minimal resistance.

Don't skip the baking sheet—this prevents a potential mess in your oven. The sweet potatoes should be soft but not mushy, with just enough structure to hold their shape when topped. If you're concerned about browning too quickly, tent the dish loosely with aluminum foil after 30 minutes of baking.

While the sweet potatoes bake, create the crispy celery crown topping. In a medium bowl, whisk together 0.5 cup of all-purpose flour, 0.25 cup of unsweetened almond milk, 1 tablespoon of extra-virgin olive oil, 0.5 teaspoon of vanilla extract, and 0.25 teaspoon of black pepper. Thinly slice the 3 whole celery stalks into ribbons using a sharp knife or mandoline.

The celery ribbons should be about 1/8-inch thick for even cooking. Toss them gently in the flour mixture until they're lightly but evenly coated. The almond milk creates a light batter that will crisp beautifully in the oven, while the olive oil adds richness to complement the sweet potatoes. Let the coated celery rest for 5 minutes while you prepare the next step.

Once the sweet potatoes are baked and slightly set, carefully arrange the celery ribbons in a decorative pattern on top of the casserole. I like to create a circular design starting from the outer edge and working my way inward, slightly overlapping the ribbons as I go. This creates that classic "crown" appearance while ensuring even cooking.

Return the casserole to the oven and bake for an additional 15-20 minutes until the celery is golden brown and crispy. The edges should be deep golden while maintaining some flexibility in the center. Watch closely during this time—celery can go from perfect to burnt in just a few minutes.

Remove the casserole from the oven and let it rest for 10 minutes before serving. This resting period allows the filling to set slightly and makes it easier to slice. The crispy celery crown will soften slightly but will still provide that delightful textural contrast with each bite.

To serve, cut the casserole into 6 equal portions (about 1.5 cups each). The combination of creamy, spiced sweet potatoes and crispy celery creates a perfect balance of textures and flavors. Each bite delivers that warm, comforting sweetness with just the right amount of spice and a satisfying crunch from the celery crown.

Regional styles of this recipe

Southern Comfort Twist

In the South, sweet potato casseroles often feature a pecan streusel instead of celery. For a Weight Watchers-friendly version, swap the celery crown for ¼ cup chopped pecans mixed with 2 tbsp almond flour and 1 tsp cinnamon.

Sprinkle this over the baked filling and broil for 5 minutes until golden. This adds Southern charm while keeping points in check—just 1 point per serving for the nuts. 🌟

Italian-Inspired Version

My nonna used to make a similar dish with roasted sweet potatoes and a brown butter topping.

For a lighter take, toss cubed sweet potatoes with 1 tbsp olive oil, 1 tsp cinnamon, and ½ tsp nutmeg, then roast at 400°F for 25 minutes before adding the yogurt mixture.

Top with a crispy sage crust (2 tbsp flour + 1 tbsp melted butter + 4 fresh sage leaves) for an Italian flair. This version feels indulgent but stays under 3 points per serving.

Mexican-Inspired Spiced Topping

For a smoky-sweet twist, replace the celery crown with a chile-lime topping. Mix ¼ cup cornmeal, 2 tbsp flour, 1 tbsp lime zest, 1 tsp chili powder, and 1 tbsp olive oil.

Spread over the baked filling and broil for 3-4 minutes until bubbly. The lime brightens the sweetness, and the chili adds a subtle kick—perfect for a Weight Watchers-friendly Mexican-inspired meal. 🌶️

Breakfast Casserole Adaptation

Transform this into a breakfast casserole by stirring in 1 cup cooked sausage (like Applegate Chicken Apple) and ½ cup shredded cheddar into the sweet potato filling. Top with a crispy egg crust (2 eggs + ¼ cup flour + 2 tbsp milk) for a protein-packed start.

This version is heartier but still balances to 4 points per serving—ideal for brunch or a lazy weekend morning. 🍳

Vegan-Friendly Version

For a plant-based take, replace Greek yogurt with ½ cup unsweetened applesauce and ¼ cup silken tofu, blended smooth. Use flax eggs (1 tbsp ground flax + 3 tbsp water) instead of regular eggs.

The celery crown stays the same, but the filling becomes naturally sweetened with maple syrup instead of brown sugar. This version clocks in at 2 points per serving and keeps all the cozy flavors. 🌱

Holiday Dinner Side

Make this a star side dish for Thanksgiving or Christmas by adding ½ cup chopped walnuts to the celery crown mix. For extra richness, drizzle with 1 tbsp maple syrup before baking.

Serve alongside roasted turkey or stuffing—the sweet-spiced potatoes complement holiday flavors beautifully while staying light enough for dessert too. 🎄

Frequently asked questions