Gluten-free Glazed Doughnut Bites

Doughnut

• 160 g milk
• 60 g caster sugar
• 2 tsp dried instant yeast
  hoặc 20 g fresh yeast, crumbled
• 1 tsp natural vanilla extract
  hoặc ½ tsp vanilla bean paste
• 1 medium egg
• 270 g gluten-free plain white flour (see tip), plus extra for dusting
• 30 g unsalted butter, soft
• 1 tsp xanthan gum
• 1 tsp gluten-free baking powder
• ½ tsp fine sea salt
• 1000 g vegetable oil, for frying

Glaze

• 150 g icing sugar
• 1 tsp natural vanilla extract
• 6 Tbsp milk, plus extra if necessary