Let margarine or butter and eggs stand at room temperature for 30 minutes.

Preheat oven to 350°F (175°C).

Grease and flour a loaf pan.

In a large mixing bowl, stir together flour, baking powder, ginger and cinnamon.

Set aside the dry ingredients.

In a separate bowl, cream together the margarine or butter and brown sugar until light and fluffy.

Beat in the eggs one at a time.

Stir in the molasses.

Gradually add the dry ingredients to the wet ingredients, mixing until just combined.

Pour the batter into the prepared loaf pan.

Bake for 50-60 minutes, or until a wooden skewer inserted into the center comes out clean.

Let cool in the pan for 10 minutes before transferring to a wire rack to cool completely.