The Summer of Shakes is a half-price deal on all Sonic's milkshakes after 8pm all summer long. The shake selection will include three new shakes along with 22 other shake flavors.
Beside the Chocolate Covered Jalapeno Shake, the other two new shakes are Oreo Peanut Butter and Salted Caramel.
The Chocolate Covered Jalapeno Shake blends vanilla ice cream with chocolate sauce and spicy jalapenos.
The Oreo Peanut Butter shakes features vanilla ice cream with Oreo cookies and peanut butter.
The Salted Caramel Shake consists of vanilla ice cream mixed with salted caramel syrup.
Last year, Sonic offered a similar promotion where they introduced the Peanut Butter & Bacon Shake among others.
