Classic Buttery Croissants

Ingredients
• 4 cups all-purpose flour
• 1/2 cup warm water
• 1/2 cup warm milk
• 1/4 cup sugar
• 2 1/4 tsp active dry yeast
• 1 1/4 tsp salt
• 1 cup (cold unsalted butter)
• 1 egg (for egg wash)
Steps