Combine all base ingredients together, mix well to form dough and press into base of lined tin. Set aside in the freezer.
In a medium bowl combine cream cheese, yogurt, maple syrup and vanilla. Mix well to form a smooth consistency. Pour over cookie dough base. Drizzle with peanut butter and sprinkle chocolate chips on top.
Set in freezer for 2-3 hours or fridge for 6 hours before cutting into small bars.