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The log should be about 12" (30 cm) long and 2" (5 cm) in diameter.
Spread a sheet of parchment paper onto a work surface. Place half of the cookie ingredients on the parchment paper and form the ingredients into a log using clean hands. Wrap the log in plastic wrap. Gently roll the log back and forth to form a uniform cylinder. Twist the ends of the plastic wrap to make sure that the log maintains its shape. Place the log into the freezer. Place the other half of the cookie ingredients onto the parchment paper, forming another log. Wrap the log in plastic wrap just as you did the first one. Put the second log into the freezer and chill the cookie ingredients for 2 hours, or until they are firm.