Soft Milky Doughnuts with Vanilla Custard Filling - Recipe By Me

Ingredients

• 3 1/2 cups all-purpose flour
• 1/4 cup granulated sugar
• 2 1/4 teaspoons instant yeast
• 1 cup warm whole milk
• 3 tablespoons unsalted butter, softened
• 1 large egg
• 1/2 teaspoon salt
• Oil, for deep frying
• 2 cups whole milk
• 4 tablespoons granulated sugar
• 3 tablespoons cornstarch
• 2 large egg yolks
• 2 tablespoons unsalted butter
• 1 teaspoon vanilla extract
• Powdered sugar, for dusting