How Long to Roast Sweet Potatoes

By The Recipes by Mom kitchen · Last checked October 21, 2026 · Not kitchen-tested; see how our recipes are made

Sweet potatoes cut into 1-inch cubes typically take 25 to 30 minutes to roast in an oven preheated to 425°F (220°C). This is a useful starting point for one of the most common ways to prepare them.

The exact time, however, depends on the oven temperature and how the sweet potatoes are cut. Roasting at a lower temperature will take longer, while cutting them into wedges can also change the cooking time. The roasting times on this page provide specific ranges for different cuts and temperatures to help guide your cooking.

How Long to Roast Sweet Potatoes: time chart

Table source: Typical ranges from standard cooking practice, not an official chart. Ovens, grills and pieces vary: start checking at the low end of each range.

Good to know

• Spread pieces apart so they caramelize

What changes the roasting time

Two main factors determine how long sweet potatoes need to roast: the size of the pieces and the temperature of the oven. Understanding these variables will help you use the time ranges effectively.

• Size and shape of the cut: Smaller pieces cook faster than larger ones because heat can reach the center more quickly. Cutting sweet potatoes into uniform pieces, such as 1-inch cubes, helps ensure that everything in the pan cooks evenly and finishes at the same time. Wedges have thinner, tapered edges that will brown and caramelize more quickly than the thicker center.
• Oven temperature: A higher temperature, like 425°F (220°C), cooks the sweet potatoes faster and creates more browning on the outside. A more moderate temperature, such as 400°F (200°C), cooks them more gently and will require a longer time in the oven to achieve a similar level of tenderness.

How to tell when they are done

Since oven performance and the exact size of your cuts can vary, it is best to check for doneness using visual and textural cues rather than relying only on a timer. Roasted sweet potatoes are ready when they are soft all the way through and have developed some color on the outside.

To check for doneness, pierce a piece with the tip of a fork or a sharp knife. It should slide in easily with very little resistance. If you feel any hardness in the center, they need more time. Visually, the sweet potatoes should look cooked and may have browned or caramelized spots, especially on the edges that were in contact with the hot pan. The amount of browning depends on the oven temperature and your preference.

Tips for better roasted sweet potatoes

A few simple techniques can improve the texture and consistency of your roasted sweet potatoes.

• Do not overcrowd the pan. Spread the sweet potato pieces in a single, even layer with some space between them. This allows hot air to circulate around each piece, which helps them roast and brown instead of steam. If you are cooking a large batch, we suggest using two sheet pans rather than piling them onto one.
• Toss them partway through. Stirring or flipping the pieces about halfway through the cooking time helps them cook and brown evenly on all sides.
• Use enough oil. Tossing the sweet potatoes in a light coating of cooking oil before roasting prevents them from sticking to the pan and helps the surfaces to brown and crisp.

Sources and method

• USDA FSIS Safe Minimum Internal Temperature Chart
• Time ranges not marked as USDA are typical ranges from standard cooking practice

Last checked October 21, 2026.