Easy gluten-free pastry (sweet or savoury) - George Eats

Ingredients

• 160 g (1 cup) white or brown rice flour (see flour notes for alternatives)
• 60 g (1/2 cup) tapioca flour
• 1 teaspoon xanthan gum
• 125 g good quality butter (cubed and chilled)
• 75 g full fat sour cream (chilled)
• Ice water (only as necessary)
• 1 teaspoon fine salt for a savoury option OR
• 40-60 g 2-3 tablespoons of caster sugar or icing sugar for a sweet option