The robbery was reported about 2 p.m. in the 100 block of W. Division Street, city spokeswoman Kristin Banfield said.
The suspects were described as white and in their late teens.
One wore a blue hoodie-style sweatshirt, blue plaid pajama pants and a beanie. The other wore a gray hoodie, a black backpack and a black beanie.
A firearm was shown during the robbery, Banfield said. The men ran away northbound.
A police dog track was unsuccessful.
Anyone with information should call 911 or Arlington police at 360-403-3400.
View Espresso stand robbery, 02-05-2013 in a larger map
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