Shape half of dough into 1 1/2-inch (3.5 cm) balls. With floured fingers, roll each ball into 10-inch (25 cm) rope, about 1/4-inch (6 mm) wide. Break off small piece from each rope for tree trunk. Carefully place ropes on ungreased baking sheet. With each rope, starting at top, fold rope back and forth into tree shape, gradually making larger at bottom (rows of dough should touch). If rope breaks, press dough together. Place small piece at bottom of each tree for trunk. Repeat with remaining half of dough.