For the dough, sift all the dry ingredients into a large mixing bowl. Add thesultanas and orange zest and mix briefly.
Using a stand mixer with dough hook or with a wooden spoon and bare hands, mix in the butter, beaten eggs and enough buttermilk for the dough to come together. Knead until you have a smooth, soft, elastic dough. Add more flour if needed.
Place into a large clean bowl, cover and allow to proof for 1 hour to double in size or overnight at cool room temperature.. Divide risen dough into 15 x +- 80 g pieces and shape into round buns. Place them onto a lined baking tray with +- 5cm space in-between each one. Cover and allow to proof in a warm area for an hour.
Meanwhile, prepare the pastry for the crosses: Rub the butter into the flour and add just enough ice-cold water to allow the ingredients to combine evenly – mix by cutting in using a knife. Roll the pastry dough into thin strips for your crosses (you will need 30 +- 8cm pieces).
Preheat oven to 180°C.
Brush risen buns gently with egg wash and arrange crosses onto each bun. Bake for 18 – 20 minutes. Not a minute longer please :-)
Meanwhile, heat the jam, sugar, and water together until sugar dissolves, Simmer for 2 minutes. Remove from heat.
Brush glaze onto freshly baked hot cross buns.
Best eaten warm- straight from the oven, microwaved or toasted with lots of salted butter or my Salted Honey & Cinnamon Butter.
To make Salted Honey & Cinnamon Butter: Blend all the ingredients in a food processor until well combined, light and fluffy! Keep refrigerated after use.