Preheat oven to 350 degrees
Place butter in a microwave-safe bowl and microwave on high for 30-45 seconds until butter is partially melted.
Add sugars and egg and stir well. Add peanut butter and vanilla and store until smooth.
Add baking soda and salt over the mixture and stir well.
Roll dough into large balls. This recipe is for 12 large cookies.
Place cookie dough balls 2 inches apart on cookie sheet. Bake for 12-18 minutes or until lightly golden.
Remove from heat and allow to cool slightly before topping with apples.