Carefully take the brioche and make a small pocket in the bread by inserting a knife halfway into the slice. Next, take a skewer and pierce the brioche all over to ensure the custard mixture can soak through.
Add one tbsp of peanut butter and one tbsp of plum jam into the pocket of the brioche.
Take a large mixing bowl and mix the eggs, vanilla extract, five-spice and milk together. Place the brioche into the egg mixture and turn to ensure it is completely covered.
Heat a large frying pan, add a knob of butter and a splash of vegetable oil (this will stop the butter from burning). Cook the brioche on each side until golden brown, this will take 1-2 minutes.
Remove and put on a plate, and drizzle with a little condensed milk. Serve with peanut butter ice cream.
