Pepperoni Pizza Rolls with Flaky Dough

Ingredients

• 2 cups all-purpose flour
• 1/2 teaspoon salt
• 1 cup unsalted butter, chilled and cubed
• 1/2 cup sour cream
• 4 ounces cream cheese, softened
• 1 1/2 cups shredded mozzarella cheese
• 1/2 cup sliced pepperoni
• 1/4 cup grated Parmesan cheese
• 1/2 teaspoon dried oregano
• 1/4 teaspoon garlic powder
• 1/4 teaspoon red pepper flakes (optional)
• 1 egg, beaten (for egg wash)
• Marinara sauce for dipping