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Sweet Potato & Sage Butter Casserole

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Creamy sweet potatoes are topped with a crispy sage butter topping in this sweet potato & sage butter casserole

And we’ve made it! Today is day 10 of my 10 days of Thanksgiving sides & desserts. I can’t believe we’re already here and Thanksgiving is TOMORROW. Holy crazy!

I hope you didn’t think I was going to send you off to cook this Thanksgiving without a sweet potato casserole recipe! This sweet potato casserole is so good. I love the texture and how smooth it is. It’s mixed with regular potatoes too so the combination is perfect. I don’t like the regular sweet potatoes and marshmallow side dish. I never did. I’ve always thought it was way too sweet and way too much like dessert. This is why I opted to make this dish as the sweet potato dish than the regular one that you always see at the Thanksgiving table.

The sage butter topping is so Fall and Thanksgiving. It gives the entire dish that savory note you need with this overall sweet dish.

I’ll have a round-up tomorrow of all the recipes I’ve had in my little series, but if you’re a planner and need to go grab the groceries today, here’s the quick link to see all Thanksgiving dishes I’ve had on the blog!

Sweet Potato & Sage Butter Casserole

A different take on the classic sweet potato casserole! The sage butter is divine!
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Prep Time: 10 minutes
Cook Time: 1 hour
Total Time: 1 hour 10 minutes
Servings: 6
Author: Julie Chiou
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  • 2 pounds (907 g) sweet potato, peeled and cubed into 2" cubes
  • 1 pound (454 g) yukon gold potatoes, peeled and chopped into 2" cubes
  • 1 ½ cups (355 ml) warm 2% milk
  • ½ cup (114 g) plus 2 tablespoons unsalted butter, melted
  • 2 ½ tablespoon fresh sage, chopped
  • 1 cup (60 g) panko breadcrumbs
  • Salt and pepper, to taste

The default measuring system for this website is US Customary. Unit conversions are provided for convenience and as a courtesy only. While we strive to provide accurate unit conversions, please be aware that there may be some discrepancies.


  • Preheat oven to 375 °F (191 °C). Lightly grease a 2.5 quart casserole dish with cooking spray and set aside.
  • In a large pot, bring water to a boil, season with salt, and add the sweet potatoes and yukon gold potatoes. Cook until fork tender, about 10 minutes.
  • Carefully drain the potatoes and put through a potato ricer or mash together with a potato masher in a large bowl.
  • Melt ½ cup (114g) butter in a small stockpot on stove and add the sage. Cook until fragrant, about 1 minute, careful not to burn it. Pour milk and butter mixture over potatoes and stir to combine.
  • In a medium, microwave safe bowl, melt remaining 2 tbsp. (28g) butter and add the panko. Mix until all breadcrumbs have been moistened.
  • Pour potato mixture into casserole dish and sprinkle breadcrumbs on top.
  • Bake uncovered for 45 minutes, or until mixture is bubbly. If topping is browning too quickly, tent with foil.
  • Serve warm.
  • You may make this up to 2 days in advance and reheat in the oven.

Recipe Notes


Serving: 1 Serving | Calories: 426 kcal | Carbohydrates: 61 g | Protein: 7 g | Fat: 21 g | Fiber: 7 g | Sugar: 11 g

This website provides approximate nutrition information for convenience and as a courtesy only. Nutrition information can vary for a variety of reasons. For the most precise nutritional data use your preferred nutrition calculator based on the actual ingredients you used in the recipe.

Course: Casserole
Cuisine: American
Keyword: side dish ideas, Thanksgiving
Recipe Rating


Saturday 7th of August 2021

I just wanted to say that I found this recipe 2 years ago and it has been one of the favorites that I have gotten from Pinterest. Simple and elegant dish but such a comfort food as well. This will be on my table every holiday! Thank you for sharing. :)

Lacey Bennett

Wednesday 18th of November 2015

My only question is...where does the Milk go??? You have it on the ingredient list but it is never mentioned in the directions. Not sure whether to add it to the potatoes while matching or if it should not be on the ingredient list at all?


Thursday 19th of November 2015

Sorry! It's definitely supposed to be in the directions and I added it. Thanks for the catch!


Saturday 15th of June 2013

I just wanted to say that you forgot to add in the milk in the directions. It looks delicious though, and I just put mine in the oven! Totally the wrong season, but what can I say.


Saturday 15th of June 2013

Thanks for catching that Courtney!! I hope you enjoyed it!

Tara @ Chip Chip Hooray

Thursday 29th of November 2012

Super belatedly: omggggg this looks to die for! Hope you had a happy Thanksgiving. :D

Chung-Ah | Damn Delicious

Monday 26th of November 2012

I'm not a fan of the marshmallows but this - this I can get on board with! And you know - it's such a shame that I have to wait once a year to make this! Maybe I'll indulge a bit and make this a couple of times throughout the year :)