Combine milk, 4 tbsp melted butter, yeast, and sugar in a large mixing bowl. Allow to sit 10 minutes or until yeast starts to bubble.
Stir in salt, cardamom, and 1 beaten egg. Then, gradually stir in the flour until the dough pulls away from the side of the bowl.
If you're using a stand mixer, switch to the dough hook and knead at level 3 or 4 for about 7 minutes. If mixing by hand, knead on a lightly floured surface until it's smooth, shiny, and has lost most of its stickiness.
Place in a greased bowl, cover with a clean kitchen towel, and allow to rise 1 hour or until doubled in volume.
Punch down dough, and divide into 2 equal halves. Roll each half into an 8"x14" rectangle, brush each half with melted butter, then sprinkle with brown sugar and cinnamon.
Starting with the long side, tightly roll each half into a log. With a sharp knife, cut each diagonal lines to make 7 triangular rolls from each log.
Place each roll, point up, on lightly greased baking sheets. Use a finger or a spoon to press down on each shape to make them look like ears. Cover with a clean kitchen towel and allow to rise until doubled, about 1 hour.
Preheat oven to 400°F Brush each roll with a beaten egg. Sprinkle each roll with pearl sugar, then bake in the oven for 10-15 minutes, or until golden brown.