Activate the yeast:Pour the lukewarm milk into a large mixing bowl. Add the active dry yeast and about 1 teaspoon of the sugar. Stir gently and let the mixture sit for 5-10 minutes, until foamy on the surface.
Combine the dry ingredients:In a separate bowl, whisk together the all-purpose flour, remaining sugar, cinnamon, nutmeg, salt, and orange zest.
Prepare the dough:Add the egg and vanilla extract to the activated yeast mixture. Gradually add the dry ingredients and mix until a rough dough forms. Add the softened butter and continue mixing until it is fully incorporated.
Knead the dough:Knead the dough by hand or with a stand mixer fitted with a dough hook for 8-10 minutes. The dough should become smooth, elastic, and slightly tacky.
Add the raisins:Add the raisins and knead gently for another 1-2 minutes, until they are evenly distributed throughout the dough.
Let the dough rise:Place the dough in a lightly greased bowl and cover it with plastic wrap or a clean kitchen towel. Let it rise in a warm place for approximately 1 hour, or until doubled in size.
Shape the buns:Transfer the risen dough to a lightly floured work surface and divide it into 12 equal portions. Shape each portion into a smooth, round bun by pulling the edges underneath and rolling it gently against the work surface.
Let the buns rise again:Arrange the buns in a parchment-lined baking dish or on a baking sheet, leaving a little space between them. Cover and let them rise for approximately 30 minutes, until soft and puffy.
Prepare the crosses:Preheat the oven to 350°F (180°C). Mix the flour with the water, adding the water gradually until a thick but pipeable paste forms. Transfer the mixture to a piping bag or zip-top bag and cut off a small corner.
Pipe the crosses:Pipe one straight line across each row of buns, then pipe lines in the opposite direction to create a cross on top of every bun.
Bake the buns:Bake the Hot Cross Buns for 25-30 minutes, until risen and golden brown. If using a baking dish, check the center buns to make sure they are fully baked.
Prepare the apricot glaze:While the buns are baking, combine the apricot jam and water in a small saucepan. Warm over low heat, stirring until smooth. Strain the glaze if the jam contains large pieces of fruit.
Glaze and cool:Brush the warm apricot glaze over the buns immediately after removing them from the oven. Let the buns cool slightly in the pan before transferring them to a wire rack. Serve warm or at room temperature.