Gluten-free hot cross buns

Ingredients

• 3 cup (405g) gluten-free plain (all-purpose) flour
• 1/2 cup (75g) potato flour
• 1/2 cup (80g) brown rice flour
• 1/2 cup (75g) tapioca flour
• 3 teaspoon mixed spice
• 1 teaspoon cinnamon
• 3 teaspoon (10g) dried yeast
• 2 teaspoon xanthan gum
• 1/4 cup (55g) caster (superfine) sugar
• 3 egg whites
• 1 egg
• 3/4 cup (180ml) olive oil
• 2 cup (500ml) milk
• 1 cup (160g) sultanas
• Flour paste (for crosses)
• 1/2 cup (65g) gluten-free plain (all-purpose) flour
• 2 teaspoon caster (superfine) sugar
• 1/3 cup (80ml) water, approximately
• Glaze
• 1 tablespoon caster (superfine) sugar
• 1 teaspoon gelatine
• 1 tablespoon water