01 - Combine bread flour, sugar, yeast, cinnamon, allspice, nutmeg, and salt in a large mixing bowl.
02 - Add softened butter, egg, and lukewarm milk, mixing until a rough dough comes together.
03 - Knead by hand or with a stand mixer for 8 to 10 minutes until the dough becomes smooth and elastic.
04 - Gently knead in currants and orange zest until evenly distributed throughout the dough.
05 - Transfer dough to a lightly oiled bowl, cover, and let rise in a warm spot until doubled, about 1 hour.
06 - Punch down dough and divide into 12 equal portions, shaping each into a ball and arranging on a parchment-lined baking tray with slight spacing.
07 - Cover shaped buns and let rise 45 to 60 minutes until puffy and nearly doubled in size.
08 - Heat oven to 350°F.
09 - Mix flour and water into a thick paste, transfer to a piping bag, and pipe a cross over each bun.
10 - Bake 20 to 25 minutes until buns turn golden brown and sound hollow when tapped on the bottom.
11 - Warm apricot jam with water in a small saucepan until melted and smooth.
12 - Brush glaze generously over buns immediately upon removing from the oven.
13 - Transfer to a wire rack and cool before serving.