Preheat your oven to 350°F (175°C). Grease an 8x8-inch baking dish with butter or cooking spray.

In a large mixing bowl, combine grated sweet potatoes, melted unsalted butter, light brown sugar, granulated sugar, beaten eggs, whole milk, and vanilla extract. Mix until smooth.

Stir in the ground cinnamon, nutmeg, and ginger, ensuring even distribution throughout the batter.

Carefully pour the batter into the prepared baking dish and smooth it out into an even layer.

Place the baking dish in the preheated oven and bake for 45-55 minutes. The top should be golden brown, and a toothpick should come out with a few moist crumbs.

Remove the pone from the oven and allow it to cool for 10-15 minutes before slicing.