Boniato Mash with Brown Butter and Sour Orange
Boniato is the Cuban sweet potato that grows all over South Florida, and it cooks up drier and starchier than the orange kind, which means it drinks in fat like a dream. Brown butter brings a nutty depth, and sour orange cuts right through it with a little brightness. No marshmallows, no brown sugar, just a grown-up mash that belongs next to anything off the grill.
Boniato mash: richer than it looks, brighter than you expect.
Boniato has been growing in South Florida gardens and farming plots for generations, and it never quite got the attention it deserves on the table. It is drier and starchier than the sweet potatoes most people grew up with, which sounds like a drawback until you realize what that means for mashing: it takes fat in a way that orange sweet potatoes simply cannot.
This recipe came together with the kind of ingredients that make sense around here. Brown butter is one of the simplest things you can do in a kitchen, and sour orange is the citrus that grew wild in Florida long before anyone was farming sweet potatoes at scale. Put them together and you get a side dish that is rich and a little bright and tastes like it belongs at a table in Alva. You can read how we raise them here.
Ingredients
Method
- 1
Put the boniato chunks in a large pot and cover with cold salted water by about two inches. Bring to a boil over high heat, then reduce to a steady simmer and cook until completely tender when pierced with a fork, about 18 to 22 minutes. Boniato can be stubborn, so check a few pieces: the center should give without resistance.
- 2
While the boniato cooks, make the brown butter. Melt the butter in a small light-colored saucepan over medium heat, swirling occasionally. It will foam, then the foam will subside, and within 4 to 5 minutes you will see golden-brown solids forming at the bottom and smell a nutty aroma. Pull it off the heat immediately and pour into a small bowl to stop the cooking.
- 3
Drain the boniato very well and return it to the hot pot. Let it sit uncovered for 2 minutes over low heat, shaking the pot once or twice, to steam off any excess moisture. This step is what makes the mash silky instead of gluey.
- 4
Mash the boniato with a potato masher or a ricer until smooth. Drizzle in about three-quarters of the brown butter and all of the warm milk, folding with a spatula until combined. Add the sour orange juice, white pepper, and salt, and taste. The citrus should be present but not sharp.
- 5
Spoon the mash onto a serving platter or into a wide bowl. Drizzle the remaining brown butter over the top and scatter the parsley. Serve immediately while it is hot.
Notes from our kitchen
- Boniato oxidizes quickly once peeled, so cut and drop the pieces straight into cold water if you are not cooking right away. Drain and proceed when your pot is ready.
- Sour oranges are common at Latin grocery stores and farmers markets throughout South Florida. If you genuinely cannot find them, use two parts fresh orange juice to one part fresh lime juice as a stand-in, not straight lemon.
- Warm the milk before adding it. Cold dairy tightens the starch and makes the mash gummy.
Common questions
Can I make this ahead of time?
You can boil and mash the boniato up to a couple of hours ahead. Keep it covered in the warm pot and stir in the butter and milk just before serving, reheating gently with a splash more milk if needed.
Where do I find boniato in Southwest Florida?
Most Latin supermarkets in Fort Myers, Cape Coral, and Naples carry it reliably, and it shows up at roadside stands around Alva and Immokalee during the cooler months. Look for firm tubers with no soft spots and a reddish-brown skin.
Is boniato the same as a white sweet potato?
It is similar but not identical. Boniato has a drier, fluffier texture and a more delicate, slightly chestnut-like flavor compared to orange sweet potatoes or the white varieties you see in supermarkets. That dryness is exactly why it absorbs butter so well.
