For the Brioche Dough:

• 3 1/2 cups (450g) all-purpose flour
• 1/4 cup (50g) granulated sugar
• 1 packet (2 1/4 tsp) active dry yeast
• 1/2 cup (120ml) warm milk
• 3 large eggs
• 1/2 tsp salt
• 1/2 cup (115g) unsalted butter, softened
• 1 tsp vanilla extract

For the Vanilla Cream Filling:

• 2 cups (480ml) whole milk
• 1/2 cup (100g) granulated sugar
• 4 large egg yolks
• 1/4 cup (30g) cornstarch
• 1 tsp vanilla extract
• 2 tbsp unsalted butter

Additional Ingredients:

• 1/2 cup (90g) chocolate chips
• 1 egg (for egg wash)
• Powdered sugar (for dusting, optional)