Homemade Soft Pretzels

INGREDIENTS

• 1 large egg yolk beaten with 1 tablespoon water
• 1 package active dry yeast
• 22 ounces all-purpose flour, approximately 4 1/2 cups
• 10 cups water
• Pretzel salt
• 1 1/2 cups warm (110 to 115 degrees F) water
• 1 tablespoon sugar
• 2/3 cup baking soda
• 2 teaspoons kosher salt
• Vegetable oil, for pan
• 2 ounces unsalted butter, melted