10 1/2 ounces/300g flour T45 (high-gluten)
8 3/4 ounces/251g butter (83-percent unpasteurized)
1/3 ounce/10g fleur de sel
8 1/2 ounces/240g sugar, plus more for dusting
1/8 ounce/5g fresh yeast
Flour T45 is the purest white flour mainly used for pastries. It can be purchased online or at specialty baking supply stores. Sprinkling the silicone baking mat with sugar helps form a caramelized crust.