Preheat the oven properly – Set your oven to 375°F (190°C) and allow it to fully preheat before placing the dish inside. A properly heated oven ensures even cooking and helps the glaze start caramelizing at the right time.

Prepare the sweet potatoes carefully – Peel the sweet potatoes using a vegetable peeler, removing all skin. Slice them into even ½-inch thick rounds. Try to keep the thickness consistent so they cook evenly. If slices are too thick, they may remain firm in the center.

Grease and arrange thoughtfully – Lightly butter or grease a 9×13-inch baking dish to prevent sticking. Arrange the sweet potato slices in slightly overlapping layers. Avoid stacking too tightly; proper spacing allows the glaze to flow around each slice.

Make a smooth glaze mixture – In a mixing bowl, combine brown sugar, cinnamon, nutmeg, salt, vanilla extract, and orange juice. Stir until the sugar begins dissolving and the mixture looks smooth and slightly syrupy. This ensures the spices are evenly distributed.

Distribute butter evenly – Cut cold butter into small cubes and scatter them evenly across the sweet potatoes. Placing butter throughout the dish helps create a rich, silky sauce as it melts.

Pour glaze evenly over layers – Slowly drizzle the prepared glaze mixture over the entire dish. Make sure every slice gets coated. Use a spoon to spread it if needed so no area stays dry.

Cover and bake to soften – Cover the dish tightly with aluminum foil. Bake for 30 minutes to allow the sweet potatoes to steam and soften. This step ensures tender slices before caramelization begins.

Uncover for caramelization – Carefully remove the foil and return the dish to the oven. Bake for another 15–25 minutes. During this stage, the sauce thickens and becomes glossy. The edges should start to caramelize lightly.

Baste for extra flavor – About halfway through the uncovered baking time, spoon some of the bubbling glaze from the bottom of the dish over the top slices. This builds a shiny finish and deepens flavor.

Check for doneness properly – Insert a fork into the center of a slice. It should slide in easily without resistance. The sauce should look thick and slightly sticky, not watery.

Rest before serving – Allow the candied yams to sit for 5–10 minutes after removing them from the oven. The glaze will continue to thicken as it cools slightly, giving you that perfect syrupy consistency.