Gather all-purpose flour, bread flour, sugar, salt, yeast, milk, water, butter, and egg wash
Mix flour, sugar, salt, yeast, milk, and water into a dough
Knead until smooth
Chill the dough
Pound butter into a flat rectangle
Roll the dough into a rectangle
Place butter on the dough
Fold the dough over the butter
Roll out the dough
Fold the dough into thirds
Chill the dough
Repeat rolling and folding several times
Roll the dough into a large sheet
Cut into triangles
Roll each triangle into a croissant shape
Place on a baking sheet
Let rise until puffy
Brush with egg wash
Bake at 375°F to 400°F until golden brown
Cool slightly before serving