Preheat your oven to 350°F (175°C). Grease a 9x5 inch loaf pan.

In a medium bowl, whisk together the all-purpose flour, baking soda, ground cinnamon, nutmeg, cloves, and salt.

In a large mixing bowl, combine the granulated sugar, brown sugar, pumpkin puree, vegetable oil, eggs, and vanilla extract. Beat until smooth.

Gently fold the dry mixture into the wet ingredients. Do not overmix.

Fold in the chopped walnuts or pecans if using.

Pour the batter into the greased loaf pan and level it off evenly.

Bake for 55 to 70 minutes or until a skewer inserted into the center comes out clean.

Let the loaf cool in the pan for 10 to 15 minutes, then remove.

In a saucepan, melt the unsalted butter. Stir in brown sugar and milk until dissolved, then gradually mix in powdered sugar.

Drizzle the glaze over the cooled loaf.

Slice and serve warm or at room temperature.