Melt the butter over medium heat.
Add the Debic Stand & Overrun and water and heat until 40 °C.
Remove the pan from the heat and add the yeast.
Combine the salt, sugar, cardamom, and flour in a large bowl.
Mix it in a dough mixer.
Add the Debic Stand & Overrun, the water, and the egg.
Knead the dough for about 5 minutes until you have a soft, pliable dough.
Leave the dough to rise covered with cling film for 30 minutes.
Knead the proved dough lightly, divide it into equal pieces of the desired size.
Place these buns on a baking tray.
Allow the dough to prove for another 40 minutes.
Bake the buns for 20 minutes at 200 °C.