S’mores Pie (No Bake)

Bahan-bahan (8 porsi)

• 1 g raham cracker crust
• ½ cup unsweetened cocoa powder
• 1 cup granulated sugar
• ⅓ cup + 1 tablespoon cornstarch
• 3 cups milk
• 1 teaspoon vanilla extract
• 3 tablespoons butter
• 1 ½ cups marshmallows