Start by combining warm milk with yeast and setting it aside until it's foamy.
Mix the dry ingredients in a bowl (or stand mixer bowl): flour, sugar, salt, and ground cardamom.
Add the cooled, melted butter and yeast mixture.
Mix, and knead until you form a smooth dough.
Add the raisins and incorporate them with the rest of the Norwegian buns dough --- try to keep them intact in the process.
Form the dough into a ball and place it into an oiled bowl.
Cover with a kitchen cloth and set aside in a warm place until it doubles.
Deflate the dough by punching it in the center, then divide it into 12 portions.
Form each piece into a small ball and place it on a baking tray lined with parchment paper, with some space between.
Cover with a cloth and set aside until the sweet raisin buns double in size --- it usually takes 30 to 45 minutes.
Preheat your oven to 200°C (375°F).
Prepare the egg wash by combining the egg with 3 tablespoons of milk.
Brush each raisin bun with the egg wash using a pastry brush.
Place the baking tray in the lower part of the oven for 12 to 15 minutes or until they turn darker in color.
Remove them from the oven and transfer them to a cooling rack for a few minutes.
Serve and enjoy your Norwegian raisin buns!