Keto Roasted Radishes
These keto roasted radishes are the ultimate low-carb potato swap, turning crisp and golden in a hot oven with garlic, butter, and Parmesan. At just 3.1g net carbs per serving and ready in 35 minutes, they make a savory, satisfying side for any meal.
Head of Nutrition · June 17, 2026

Nutrition per serving
Per serving · makes 4. Values are estimates; brands vary.
Roasting transforms humble radishes from sharp and peppery into mellow, golden, and almost potato-like, making them the perfect keto side. Tossed with garlic butter and finished with Parmesan and lemon, they deliver all the comfort of roasted potatoes at a fraction of the carbs.
Ingredients
- 2 lbs fresh radishes, trimmed and halved (quartered if large)
- 3 tbsp olive oil
- 2 tbsp unsalted butter, melted
- 3 cloves garlic, minced
- 1/4 cup grated Parmesan cheese
- 1/2 tsp salt
- 1/2 tsp black pepper
- 1/2 tsp smoked paprika
- 2 tbsp fresh parsley, chopped
- 1 tbsp fresh lemon juice
Instructions
- 1
Preheat the oven to 425°F (220°C) and line a large rimmed baking sheet with parchment paper.
- 2
In a large bowl, toss the halved radishes with olive oil, melted butter, minced garlic, salt, pepper, and smoked paprika until evenly coated.
- 3
Spread the radishes in a single layer, cut-side down, on the prepared baking sheet so they brown well and don't steam.
- 4
Roast for 20 to 25 minutes, stirring once halfway through, until the radishes are fork-tender and golden at the edges.
- 5
Remove from the oven and immediately sprinkle with grated Parmesan, letting it melt over the hot radishes.
- 6
Finish with a squeeze of fresh lemon juice and a scatter of chopped parsley, then serve warm.
Tips & notes
- Roasting tames the peppery bite of raw radishes, leaving them mild and almost potato-like. Don't skip the single-layer arrangement, as crowding the pan steams them instead of crisping.
- For a dairy-free version, swap the butter for extra olive oil and skip the Parmesan, finishing with nutritional yeast for a savory note.
- Store leftovers in an airtight container in the fridge for up to 4 days. Reheat in a hot skillet or oven to bring back the crisp edges; the microwave softens them too much.
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Frequently asked questions
- How many carbs are in keto roasted radishes?
- Each serving has 3.1g net carbs, 142 calories, 3.4g protein, and 12.6g fat. This recipe makes 4 servings, making it an easy fit for a keto or low-carb meal plan.
- Do roasted radishes really taste like potatoes?
- Roasting at high heat mellows the sharp, peppery flavor of raw radishes and softens their texture, giving them a tender, mild taste that's a convincing low-carb stand-in for roasted potatoes.
- Which radishes work best for roasting?
- Standard red globe radishes are ideal and widely available. Choose firm, similarly sized radishes so they cook evenly, and halve or quarter any large ones so every piece roasts at the same rate.



