Preheat oven to 350F (325F if using a glass or dark loaf pan).

Grease and flour a 9x5x3-inch loaf pan.

In a large bowl, beat butter and brown sugar until light and fluffy.

Beat in eggs one at a time.

Add vanilla extract.

In a separate bowl, combine flour, baking powder, and salt.

Gradually add the flour mixture to the sugar mixture, mixing until just combined.

If desired, add toasted chopped pecans.

Pour batter into the prepared loaf pan.

Bake for approximately 1 hour, or until a toothpick inserted into the center comes out clean. Check for doneness at 55 minutes.

Remove from pan and cool completely on a wire rack.

Slice and serve. Garnish with whipped cream and assorted berries, if desired.