For the potato mash just cook 125 g potatoes and mash them with a fork. While still warm mix in the butter.

In another bowl mix the egg, milk and buttermilk (ingredients should be room temperatured). Crumble the yeast and add it to the mix. Now take the potato mash and mix in the bowl as well.

In another bowl mix flour, sugar, salt, cranberries and add this mix to the liquid ingredients. Knead for about 5-10 minutes until a very smooth and not sticky dough comes out. Let it rest for at least 1 hour.

Preheat oven to 190°C. Take the dough, knead it again and form any shapes you like. Place on a baking paper and let the yeast react again for 20 minutes. Then bake buns for 20-25 minutes (depends on size of your buns! But be careful and don't bake them for too long, then your buns will be dry and crumbly). Let them cool on a wire rack and enjoy them still warm.