01 - Combine the bread flour, granulated sugar, instant yeast, ground cinnamon, ground allspice, ground nutmeg, and fine sea salt in a large mixing bowl.
02 - Add softened butter and orange zest to the dry mixture. Pour in lukewarm whole milk and crack in the large egg. Mix until a shaggy dough forms.
03 - Knead by hand on a floured surface or with a stand mixer fitted with a dough hook for 8–10 minutes until smooth and elastic.
04 - Fold the currants or raisins into the dough until evenly distributed throughout.
05 - Place dough in a lightly oiled bowl, cover with plastic wrap or a clean towel, and let rise in a warm place until doubled in size, approximately 1 hour.
06 - Turn dough onto a lightly floured surface. Divide into 12 equal pieces and roll each into a smooth ball.
07 - Arrange buns on a parchment-lined baking tray, leaving space for expansion. Cover and let rise for 45 minutes until puffy.
08 - Preheat oven to 400°F.
09 - Mix plain flour with 5–6 tbsp water to form a thick, pipeable paste. Transfer to a piping bag or small zip-top bag.
10 - Pipe a cross shape over each bun using the flour paste.
11 - Bake for 20–25 minutes until golden brown and cooked through.
12 - Warm apricot jam with 1 tbsp water in a small saucepan or microwave until thinned.
13 - Brush the warm jam glaze over the hot buns for a shiny finish. Transfer to a cooling rack and let cool completely.