PLACE buttermilk in a medium bowl. ADD thawed shrimp and SOAK for 30 minutes
In a pie plate or shallow bowl, COMBINE the cornstarch, baking soda, salt and panko breadcrumbs.
In a 2-quart sauce pan, ADD cooking oil and HEAT to 350 degrees.
REMOVE shrimp from the buttermilk. PLACE on paper towels and use paper towel to pat dry.
COAT shrimp with cornstarch mixture.
PLACE shrimp, a few at a time, in the oil. FRY for approximately 2 minutes or until the shrimp turns medium brown in color.
REMOVE shrimp from oil, and PLACE on paper towel-lined plate to drain and cool.
SERVE with sauce on the side for dipping.