Chocolate hot cross buns

Ingredients

• 4 teaspoons (14g) dry yeast
• 1/3 cup (75g) caster (superfine) sugar
• 1 cup (250ml) warm milk
• 4 cups (600g) plain (all-purpose) flour
• 1 teaspoon mixed spice
• 1 teaspoon ground cinnamon
• 1/2 teaspoon salt
• 80 grams (2½ ounces) butter, chopped
• 1 1/2 cup (185g) dark choc bits
• 1 egg, beaten lightly
• 1/3 cup (80ml) warm water, approximately
• 1/4 cup (35g) plain (all-purpose) flour
• 1 tablespoon sifted cocoa powder
• 2 teaspoons caster (superfine) sugar
• 1/4 cup (60ml) cold water, approximately
• 1 tablespoon caster (superfine) sugar
• 1 teaspoon powdered gelatine
• 1 tablespoon water