Combine the yeast, sugar and milk in a bowl. Set aside for 5-10 minutes or until bubbles form on the surface.
Combine the flour, mixed spice, cinnamon, butter, egg, extra sugar, sultanas, mixed peel and yeast mixture in a large bowl. Mix with a butter knife until a sticky dough forms. Knead on a lightly floured surface for 5–10 minutes or until it feels smooth and elastic when pressed. Place in an oiled bowl, cover with a tea towel and stand in a warm place for 30–40 minutes or until doubled in size.
Lightly knead the dough again, divide into 12 pieces and roll into balls. Place in a 23cm-square cake tin lined with non-stick baking paper. Cover with a clean tea towel and set aside in a warm place for 25–30 minutes or until doubled in size.
Preheat oven to 200ºC (390ºF). To make the crosses, combine the flour and water to make a smooth paste. Place in a piping bag** and pipe crosses onto the buns. Bake for 30–35 minutes or until well browned and springy to touch.
To make the glaze, combine the sugar, gelatine and water in a saucepan over medium heat and stir for 2 minutes or until dissolved. Brush warm buns with the glaze and serve with butter. Makes 12.
* You will need this amount of yeast because of the amount of sugar in the recipe.
** To make a piping bag, fill a ziplock bag with the cross mixture and snip off one corner.