Generously butter a loaf pan (or use a non-stick baking spray). I use a loaf pan which is 25 x 10.5 cm/10 x 4 inches.
The dough will have risen more overnight in the fridge.
Punch down the dough to release the air from the dough.
Gently knead the dough into a smooth ball.
Weigh the ball of dough and divide this measurement by 6, so that you can portion the dough into six pieces equally. You can, of course, just eye-ball the measurement.
Roll each piece of dough into a smooth ball, and then gently elongate the balls of dough into a small fat log.
Arrange the six logs of dough into the loaf pan.
Place the loaf pan somewhere warm for the dough to rise and at least double in size. This should take 1-3 hours. I generally aim for the edges of the brioche dough to rise to about 1-2 cm (1 inch) below the rim of the pan. Once you bake the brioche, it will continue to rise a lot more.
Preheat the oven to 200°C (390°F) (without fan). Place a metal baking sheet in the oven.
Gently brush the top of the brioche loaf with the eggwash.
Sprinkle the brioche loaf with pearl sugar.
Place the loaf pan on the metal baking sheet (which has been preheating in the oven).
Bake the brioche loaf for 30-35 minutes, or until it is lightly golden. You might want to check your brioche at about 10-15 minutes to make sure it is not browning too quickly. If so, place a sheet of foil over the brioche to stop it from browning further.
If you have a digital thermometer, the brioche is cooked if the internal reading is 85°C/185°F.
Remove the brioche loaf from the oven and let it settle in the pan for about 5-10 minutes before unmoulding.
Let the brioche cool completely on a wire rack before serving.
I recommend using a serrated knife to slice the brioche.