Recipes > Side > Roasted Sweet Potato and Banana Casserole

Roasted Sweet Potato and Banana Casserole

This roasted sweet potato and banana casserole relies on the natural sweetness of bananas rather than sugar. It's a healthier version of a sweet potato casserole!
roasted sweet potato and banana casserole with pecans and granola topping

Roasted sweet potato and banana casserole is a great alternative to traditional sweet potato marshmallow bakes. You still get the sweet, warm, and comforting taste of a classic sweet potato casserole, but with a fraction of the sugar and unhealthy fats. Give this healthy fall and Thanksgiving recipe a try, then be sure to leave a rating and review!

Three Must Know Cooking Skills

For recipe success, learn how to:

Culinary Tips for this Easy Sweet Potato Casserole

When roasting the sweet potatoes, we recommend lining the sheet pan with foil or parchment paper for easier clean up.

Prick the potatoes before cooking to prevent a sweet potato explosion in your oven!

Watch this video to learn how to roast bananas! Roast the bananas with the peel on. Choose bananas that are bright yellow or speckled. If you have overly ripe bananas, don’t roast them and just use them as they are.

If making this recipe for a Thanksgiving meal, save yourself some oven time on Thanksgiving day by preparing the sweet potato mixture the day before (or even a few days before!). Keep the granola topping separate. When ready to bake, bring the dish to room temperature, top with the granola mixture, then bake. If you don’t bring it to room temperature first, it will take longer to cook.

Already have some of our homemade granola on hand? You can use that as the topping instead! Add it after baking so that it doesn’t burn.

Ingredient Substitutions

  • Sweet Potatoes: use any variety.
  • Maple Syrup: substitute honey, agave, or brown sugar. 
  • Pumpkin Pie Spice: substitute equal parts cinnamon or make your own pumpkin pie spice by mixing together cinnamon, ginger, ground cloves, and nutmeg.
  • Milk/Milk Alternative: use any variety – cow’s, almond, cashew, hemp, oat, rice, soy, etc. Learn the differences between different milks in this article: plant-based milk vs. cow’s milk.
  • Canola Oil: substitute avocado oil. Do not substitute olive oil, as this has a strong flavor. Do not substitute vegetable oil, as this is not a heart-healthy oil. 
  • Oats: use old-fashioned, rolled, or quick oats. Do not use steel cut oats.
  • Pecan Pieces: substitute chopped or sliced walnuts, cashews, almonds, or pistachios.

We love buying our spices from The Spice House. Click on the picture below to view & try out hundreds of flavorful spices and herbs!

row of spices

Recipe Variations

Don’t want to add the granola mixture? No problem! This baked sweet potato and banana casserole is delicious on its own or topped with toasted chopped pecans. By making the roasted banana and sweet potato mash without the granola, you’ll be saving lots of oven space and time too!

If you want to make a sweet potato banana orange juice casserole, replace the maple syrup with orange juice and leave out the milk. If the mixture is too thick, add more orange juice.

Equipment Recommendations

This recipe doesn’t require a ton of fancy equipment. However, you will need a food processor or an immersion blender to mix the sweet potatoes and bananas. A handheld mixer also works, but the resulting texture won’t be as smooth. You can also mash the mixture with a potato masher; this will also create a chunkier texture.

Is this a Healthy Sweet Potato Casserole?

We are always encouraging people to increase their fruit and vegetable intake. This sweet potato and banana casserole recipe can certainly help you do that! The featured ingredients in this recipe are sweet potatoes, bananas, oats, and pecans.

Sweet Potatoes

All varieties of sweet potatoes contain disease-fighting phytochemicals, vitamins, minerals, and fiber. Sweet potatoes have natural sugars that are enhanced by roasting.


Bananas contain prebiotic fiber, vitamins, and minerals – important for digestion, energy, and metabolism. Greenish bananas are firm and are higher in prebiotic fiber. Brownish bananas are soft and are higher in sugar, making them a bit sweeter. By making this sweet potato casserole recipe with bananas, you get natural sweetness from bananas, plus many other important nutrients!


Oats are a good source of fiber and complex carbohydrates. Fiber is important for digestion, satiety, stable blood sugar, good cholesterol, and healthy gut bacteria. Complex carbohydrates are important for energy and focus. (1)

Learn more about oats in this article: Different Types of Oats: Health Facts, Cooking Tips, and Recipes.


Nuts of all varieties contain plant-based protein, fiber, and healthy fats that help you feel satisfied until your next meal. Pecans are a great source of heart-healthy monounsaturated fats.

Healthy Sweet Potato Bake Serving Suggestions

Serve this roasted sweet potato and banana casserole alongside a Thanksgiving spread. Or enjoy any time this fall for a healthy autumn dessert. Leftovers are great for breakfast too!

Want more ideas about how to create a colorful Thanksgiving menu? Check out this article!

Thanksgiving 2021: A Colorful Menu to Brighten your Year

Storage Recommendations

Store leftover sweet potato casserole covered in the fridge for up to one week. The granola mixture will lose some of its crispness the longer that it sits, but the flavor will still be great!

Want more flavorful seasonal recipes?

Check out these fall favorites!

Apple Cinnamon Bread

Whole Wheat Pumpkin Muffin Bars

Butternut Squash Quinoa Salad

Roasted Spiced Cauliflower

roasted sweet potato and banana casserole with pecans and granola topping

Roasted Sweet Potato and Banana Casserole

This roasted sweet potato and banana casserole relies on the natural sweetness of bananas and is enhanced by just a touch of maple syrup. It's a healthier version of a sweet potato casserole!
4.43 from 7 votes
Prep Time 10 minutes
Cook Time 1 hour 20 minutes
Total Time 1 hour 30 minutes
Course Side
Cuisine American
Servings 8 servings


Sweet Potato Banana Mixture

  • 2 ½ pounds sweet potatoes
  • 2 unpeeled medium ripe bananas
  • 1-2 Tablespoons maple syrup
  • 1-2 teaspoons pumpkin pie spice
  • 2 Tablespoons – ¼ cup milk or milk alternative
  • Salt to taste

Granola Topping

  • 2 Tablespoons canola oil
  • 1 Tablespoon maple syrup
  • ¼ teaspoon pumpkin pie spice
  • ½ cup old fashioned oats
  • ½ cup raw pecan pieces


  • Preheat oven to 400° F. Prick sweet potatoes several times with a fork and place on a foil lined sheet pan. Roast sweet potatoes for 45 minutes or until almost done. Add unpeeled bananas and roast for 10 additional minutes.
  • Let sweet potatoes and bananas stand at room temperature until cool enough to handle.
  • Using a food processor or hand held immersion blender, puree sweet potatoes, peeled bananas, maple syrup, and pumpkin pie spice. Stir in milk or milk alternative to ensure the mixture is not too thick or dry. Season with salt to taste. Transfer to a 1.5-2 quart casserole dish. Using a spatula, spread to fill dish and ensure a smooth top.
  • In a medium bowl, combine oil, maple syrup, and pumpkin pie spice. Add oats and pecan pieces. Stir to combine. Sprinkle evenly on sweet potato mixture.
  • Reduce oven to 375° F and bake for about 25 minutes or until granola topping is golden brown and sweet potato mixture is hot. Enjoy!


The time it takes to cook your sweet potatoes will vary depending on their size. They are done when they are easily pierced with a fork. For this recipe, it is better to slightly overcook than undercook.
If you want to prepare this dish the day before, keep the granola topping separate and add it just before baking. We recommend bringing the dish to room temperature before baking for a quicker cook time. If still cold, it will take longer than 25 minutes.
Keyword Roasted Sweet Potato and Banana Casserole

This Post Has 12 Comments

  1. Robin

    I made this recipe for Thanksgiving and it was a huge fail. This recipe really needs eggs for binder. The resulting texture was dry and crumbly and extremely unappealing.

    1. Thank you for visiting our website Robin, but we are so sorry to hear that the recipe didn’t work for you! Did you follow it exactly as written? I have been making this recipe for years, and can’t say it has ever come out dry – the sweet potatoes and bananas provide so much moisture and puree smoothly. We would love to help identify what went wrong!

  2. FWFoodie

    My wife just made this for Thanksgiving this past week. Yummy and the little ones ate it right up as well. No leftovers in this house!

  3. Maneck j Bharucha

    It has a very nice taste and … it complimented the thanksgiving meal and all the guests enjoyed it … I added a couple of tablespoons of whipping cream to add some extra creaminess

  4. Michelle

    Has this for Thanksgiving this year instead of the typical marshmallow covered casserole. The bananas add a nice layer of flavor and the sweetness level is just right. The kids ate it too, so I consider this recipe a win.

    1. Glad you and the kids enjoyed it! We think it is a great sub for the standard marshmallow topped casserole 🙂

  5. ali

    I’ve been making this for many years to the delight of everyone. Instead of a crumble topping I put whole cranberry sauce with pecans on the side. I can’t see any way this could be dry and crumbly.

  6. Charlene

    Delicious! Great recipe for a plant based diet. I will be saving this recipe for a holiday dish!

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