Preheat oven to 400°.

Add flour, baking powder and salt to a large mixing bowl, stirring to combine.

Cut butter into chunks and add to the flour mixture. Crumble the butter into pea-sized pieces using your fingers, a fork or pastry cutter.

Stir in the buttermilk, mixing until dough comes together.

Place dough onto a lightly floured surface. Press into a rectangle, about 1 inch thick.

Fold the dough in half, pressing into a rectangle, repeat until dough has been folded 4 times.

Use a rolling pin to lightly roll dough into a 15 inch x 6 inch rectangle.

Spread orange marmalade over the dough in an even layer.

Sprinkle with cranberries and then chopped walnuts.

Starting on the long side, roll the dough up.

Use a serrated knife to slice into 1 1/2 inch thick rolls.

Butter an 11 x 9 inch baking dish.

Place rolls into the baking dish and slightly flatten with your hands.

Bake for 15- 17 minutes or until rolls are cooked through.

Remove from oven.

Whisk the powdered sugar and milk together in a small bowl.

Drizzle over warm rolls.

Serve warm or at room temperature.