Sonic Spins Up New Espresso Shakes

Sonic gives their shake selection a bit of a buzz this fall with the debut of new, limited-time Espresso Shakes.

The new shakes drop a double shot of espresso into Sonic's vanilla ice cream before giving it a spin with a blender.

Two varieties are available: the Original Espresso Shake and Oreo Espresso Shake, which tosses in some Oreo cookie pieces before blending.

For an idea of the caffeine content, a medium Espresso Shake contains about 112 mg of caffeine, which is close to what you'd find in an 8-fl oz cup of drip coffee.

Photo via Sonic.