It cost me $2.75 for one.
The icing added added a fairly creamy note to go with the sweetness. The flavor of the frosting and the cookie butter components teeter around half and half even as there's more cookie butter than frosting. The crushed speculoos on top don't contribute much save for a visual effect.
Nutritional Info - Starbucks Cookie Butter Bar (68g)
Calories - 360 (from Fat - 200)
Fat - 23g (Saturated Fat - 11g)
Sodium - 200mg
Carbs - 36g (Sugar - 22g)
Protein - 2g