Prepare all ingredients.
Prepare levain using 50 g flour along with yeast.
Leave to ferment about 10 minutes.
Using a beater, mix the levain, rest of flour, water, sugar, salt, and milk powder.
Knead on medium speed until the dough comes away from the sides of the bowl.
Add butter...
...and mix the dough until smooth.
Cover with a tea towel and leave to prove for one hour at room temperature.
the dough and weigh 50 g balls.
Form balls and place them in a silicone cake mold.
Leave to rise at a temperature close to 30/35°C.
Bake 15 minutes at 220°C...
...until the whole surface of the bread is well browned.
When finished, remove from the oven...
...and remove from the mold.
Leave to cool.