Place the milk, water and sugar into a jug or small bowl. Add the yeast and stir to combine. Allow to sit for 10 minutes to "bloom" or until mixture is foamy.
Combine flours and salt in a large bowl or in the bowl of your stand mixer, making a well in the centre. Add the yeast mixture and olive oil, then mix to form a shaggy dough.
If using a stand mixer, attach your dough hook and knead on low speed for 5-6 minutes or until the dough is smooth and elastic or if kneading by hand, knead for 8-10 minutes or until the dough is smooth and elastic.
Place dough ball into a large, lightly oiled bowl and cover with a damp tea towel or plastic wrap. Set aside in a warm place and allow it to rise for 1 hour or until doubled in size.
Lightly dust your work surface with flour. Knock the air out of the dough and divide dough into 6 equal pieces. Roll each into a ball and keep covered with a clean tea towel.
Lightly flour your work surface then working with one dough ball at a time, flatten it out with the palm of your hand. Using a rolling pin, roll out dough in a circular motion to approximately 15cm in diameter. Set aside and allow to rise to rise again for 20-30 minutes. Repeat with remaining dough balls.
While dough is resting, preheat your oven with a pizza stone or baking steel to the highest temperature it will go. If you have neither of these, you can use a flat oven tray upside down instead.
Working with one pita bread at a time, transfer to the stone or tray in the oven and cook for approximately 3-5 minutes or until the bread has puffed up and is lightly golden in colour. (See Note 2). Carefully remove from oven and transfer to a wire rack or clean tea towel. Cover to keep warm if desired. Repeat process with remaining 5 pita breads. Serve.