Chef John's Croissants

Ingredients (9)

• + 1 cup warm water (100 degrees F or 38 degrees C) add to pantry
• + 1 (.25 ounce) package active dry yeast add to pantry
• + ¼ cup granulated white sugar add to pantry
• ✓ 3 ½ cups unbleached bread flour
• + 3 teaspoons kosher salt add to pantry
• + 6 tablespoons butter, room temperature, cut into pieces add to pantry
• + 2 sticks unsalted European-style butter add to pantry
• + 1 egg add to pantry
• + 1 tablespoon water add to pantry