In a large bowl, combine pumpkin puree, brown sugar, evaporated milk, eggs, cinnamon, ginger, cloves, nutmeg, and vanilla extract. Mix well.
Pour mixture into the unbaked pie crust.
Bake for 15 minutes at 425°F (220°C), then reduce heat to 350°F (175°C) and bake for another 40-45 minutes, or until a knife inserted near the center comes out clean.
Let cool completely before serving.
Notes
For a richer flavor, use a combination of brown and granulated sugar. You can also add a pinch of salt to enhance the flavors.