1In a large bowl, whisk together flour, castor sugar and yeast.
2Add eggs and warm water, combine to form a dough. Knead for 10-12 minutes. Once smooth and elastic, add butter and knead until absorbed. Check the windowpane test.
3Cover and rest the dough for 1 hour, or until it doubles in volume.
4Punch down the dough, make equal-sized portions (70g), seal them into dough balls, and proof for another 45 minutes.