Adjaruli Khachapuri | America's Test Kitchen

Ingredients

• 1 3/4 cups (8¾ ounces/248 grams) all-purpose flour
• 1 1/2 teaspoons sugar
• 1 teaspoon instant or rapid-rise yeast
• 3/4 teaspoon table salt
• 1/2 cup plus 2 tablespoons cold water
• 1 tablespoon extra-virgin olive oil
• 6 ounces (170 grams) whole-milk mozzarella cheese , shredded (1½ cups)
• 6 ounces (170 grams) feta cheese , crumbled (1½ cups)
• 1 large egg yolk
• 1 tablespoon unsalted butter