Cookwith - Cornflake Cookie Pudding Parfait

Ingredients

• 2 cups whole milk
• 1/2 cup heavy cream
• 3/4 cup granulated sugar
• 1/4 teaspoon kosher salt
• 1/4 cup dry milk powder
• 1/4 cup unsalted butter
• 2 cups cornflake cereal, plus more for garnish
• 1 teaspoon vanilla extract
• 3 tablespoons cornstarch
• 6 soft frosted sugar cookies (store-bought or homemade), crumbled
• 1/2 cup rainbow sprinkles