In a large bowl, combine the flour, yeast, sugar, and salt.

In a separate jug, mix the warm water, milk, and oil, and then incorporate into the dry ingredients.

Knead the dough for about 5 minutes until smooth and elastic.

Cover the dough and place it in a warm area to rise for about 1 hour until doubled in size.

Prepare your chosen custard filling while the dough is rising.

Once risen, punch down the dough, knead for 3 minutes, and divide into 12 pieces.

Roll each piece into a circle, place custard in the center, fold, and seal edges tightly.

Cook the buns in a non-stick skillet over low heat for about 10 minutes until golden, then flip and cook for another 5 minutes.

Allow the cooked buns to cool slightly before serving, optionally dusting with powdered sugar.