Homemade Italian Bomboloni - Soft Cream-Filled Doughnuts Recipe

Ingredients

• 2 cups strong bread flour (280g)
• 2 cups 00 flour or all-purpose flour (280g)
• 3 large eggs, at room temperature
• 6 1/2 tablespoons softened butter (90g)
• ½ cup granulated sugar (100g)
• ½ cup lukewarm milk (120ml)
• ½ teaspoon vanilla paste or 1 teaspoon vanilla extract
• 2¼ teaspoons fast action yeast (7g)
• 1 small pinch of salt
• 2-3 tablespoons caster sugar or confectioners sugar for coating
• 5 egg yolks
• 2½ cups milk (500ml)
• ¼ cup cornstarch (30g)
• ⅓ cup sugar (70g)
• ½ teaspoon vanilla paste or 1 vanilla bean
• Zest of 1 fresh lemon
• Sunflower or vegetable oil, for deep frying