Vatrushka

Ingredients (12)

• + 1 ½ (.25 ounce) packages active dry yeast add to pantry
• + 1 pinch white sugar add to pantry
• + ½ cup lukewarm milk add to pantry
• + 2 cups all-purpose flour add to pantry
• + ¼ cup unsalted butter, melted add to pantry
• + 1 pinch salt add to pantry
• + 1 teaspoon vanilla extract add to pantry
• + 1 egg add to pantry
• + 1 teaspoon vegetable oil add to pantry
• + 2 cups farmer's cheese add to pantry
• + 2 tablespoons sour cream add to pantry
• ✓ 1 egg yolk, beaten