Mashed Purple Sweet Potatoes and Banana

Mashed Purple Sweet Potatoes and Banana

I don’t know when I started adding banana to my mashed sweet potatoes. But it was obvious that was what I needed to do with a couple of the Stokes purple sweet potatoes I picked up at the grocery store. Plus, I needed mashed purple sweet potatoes for another bake this weekend.

This recipe makes a sweet side dish. If you like banana, this is the recipe for you.

And they stayed purple! After a few disappointing adventures in color with somewhat purple latkes and my reddish velvet beet waffles, I am in love with the color of these mashed purple sweet potatoes.

How to cook purple sweet potatoes

This recipe starts off with roasted purple sweet potatoes. I roast sweet potatoes wrapped in foil after poking a few holes in the skin.

One of the best things about this recipe is that the richness of this recipe comes from the potatoes and the banana. So you can make these as vegan mashed sweet potatoes without butter or cream. You won’t miss the butter at all.

a cutting board with a cut purple sweet potato, a whole potato, and a knife
roasted sweet potatoes for this mashed purple sweet potato recipe

Frequently asked questions about mashed purple sweet potatoes and banana

Are purple sweet potatoes the same as purple yam?

A few posts ago, I wrote a few sentences to answer this question about purple sweet potatoes and purple yams (ube). Hint: the only thing they share in common is their color.

Do I have to peel the sweet potato?

Nope. If you don’t mind peel in your mashed potatoes, feel free to keep it in.

Can I make these vegan?

Absolutely. Most of the richness in this side dish comes from the sweet potatoes and banana. You could add a vegan butter or any non-dairy milk of your choice to make them creamier. Or you could leave both out.

Can I make this with sweet potatoes of a different color?

Of course. White, orange, or purple-fleshed. It all works.

Can you freeze mashed sweet potatoes?

Yes. Sweet potatoes can be frozen either after cooking or after mashing and stored for months. The texture won’t be the same, but they’ll still taste good.

a bowl of baked sweet potato, a banana, and a potato masher

Mashed purple sweet potatoes and banana

Prep Time 5 minutes
Cook Time 1 hour
5 minutes
Total Time 1 hour 10 minutes
Servings 2
Author uglyducklingbakery


  • 2 small purple sweet potatoes
  • 1 small to medium banana
  • ½ tsp salt
  • 1 tbsp butter, optional
  • 1 tbsp cream or milk (dairy or non-dairy), optional


  • Preheat the oven to 450°F.
  • Scrub the sweet potatoes. Use a fork to puncture the skin in several paces, and then wrap them in aluminum foil.
    2 small purple sweet potatoes
  • Bake for 45-60 minutes until the skin is easily pierced with a fork.
  • Let the potatoes cool enough so that you can handle them. If you want to peel them, use a knife to cut a thin slit in the skin and peel.
  • Combine the peeled sweet potatoes and banana in a small to medium sized bowl and mash them with a potato masher or fork until well-combined. Add salt and butter and/or cream/milk, if you are using them, adding a little bit at a time and adjusting for taste and texture as desired. Serve warm.
    1 small to medium banana, 1/2 tsp salt, 1 tbsp butter, optional, 1 tbsp cream or milk (dairy or non-dairy), optional


The butter and cream are completely optional in this recipe.

What’s next?

If you make mashed purple sweet potatoes, want to ask a question about sweet potatoes, or just want to share your love of purple food, please comment and/or share a pic!

Enjoy some other uglyducklingbakery recipes with purple sweet potatoes like baked purple sweet potato loaded with white beans, my purple sweet potato sourdough, or the purple sweet potato pancakes I mentioned before.

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pan roasted chicken breast on top of purple mashed sweet potato

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