The new shake features vanilla ice cream blended with birthday cake syrup and finished with whipped topping and colorful sprinkles.
The pricing is a bit wonky at my local Jack in the Box: it's $1.99 for a 16-oz regular but $3.79 for a 24-oz large (may vary).
Photo via Jack in the Box.
Nutritional Info - Jack in the Box Birthday Cake Shake (392g)
Calories - 860 (from Fat - 400)
Fat - 44g (Saturated Fat - 33g)
Sodium - 240mg
Carbs - 109g (Sugar - 94g)
Protein - 11g