Preheat oven to 325 F.
Butter, flour, and line with parchment one 9x5 loaf pan.
Sift the flour, and cardamom twice.
In the bowl of stand mixer, (or with a regular hand mixer) beat the sugar, salt, and butter on medium-high until fluffy and light. For perfect aeration, this should take about 10-15 minutes in a stand mixer. For the hand mixer, about 20-25 or more. Be patient, Popeye. (o;
Be certain to scrape bowl periodically to ensure complete incorporation of ingredients.
Add each egg one a time. Beat thoroughly before adding the next. After this, you should have one fluffy bowl sweet egg-enriched butter. Scrape the bowl.
Add the flour in thirds beating on medium for roughly 20 seconds between additions. Beat an additional 30 seconds after the last addition.
Bake for approximately 1 hour. At the 55 minutes, begin checking for doneness. Usually, this cake bakes out at 62 minutes. Just remember, not all ovens are created equal.