Put the whole milk (from the ice cream base) and chopped apple in a blender until combined.

Prepare the Salt & Straw ice cream base per the recipe below using the apple flavored milk and chill overnight.

Combine Ingredients: In a small bowl, mix the peanut butter, light corn syrup, and vegetable oil (if using) until smooth. The corn syrup helps to keep the peanut butter slightly soft, even when frozen.

Adjust Consistency: If the mixture is too thick, you can add a bit more corn syrup or a few drops of warm water until it reaches a smooth, pourable consistency.

Churn the Base: Add the apple ice cream base to your ice cream machine and churn.

Layering: For more pronounced swirls, layer the ice cream base and the swirl mixtures in your storage container. Spoon a layer of ice cream base, add dollops of peanut butter and Nutella, and repeat until all the mixture is used.

Freeze: Transfer the swirled ice cream to a container and freeze for at least 2 hours before serving.