Dissolve yeast in warm milk in a bowl of stand mixer.

Add 2 cups flour, 1 cup sugar, salt, cardamom, and eggs.

Beat 1 minute on speed 2.

Add 1/4 cup melted butter and 4 cups flour.

Change to dough hook and mix well.

Gradually add another 1/4 cup melted butter.

If too soft, add flour 1/2 cup at a time until dough is workable, but still sticky.

Knead with dough hook for 5 minutes.

Cover and let rise until doubled in size (2-1/2 to 3 hours).

Meanwhile, mix together remaining 1/2 cup sugar with cinnamon. Set aside.

Butter and flour four loaf pans.

Punch down dough and divide into 4 equal pieces.

With each piece of dough, roll into 9x12 inch rectangle.

Brush dough with melted butter and lightly sprinkle with cinnamon sugar.

Roll dough into log and pinch seam closed.

Place in prepared loaf pan seam side down.

Cover and let rise until doubled (2 to 3-1/2 hours).

Bake at 350 degrees for 15-20 minutes until dark golden brown.

To serve, slice, toast, and slather with salted butter.