In medium saucepan, combine water, butter and molasses; heat until very warm (120°F-130°F) and butter is almost melted. With mixer on low speed, gradually beat the warm liquid into the flour mixture just until blended. Add molasses and egg; beat 2 additional minutes. Stir in remaining flour mixture. Turn dough onto floured surface; knead in additional all-purpose flour until smooth and elastic, about 6 minutes. Shape dough into a 12 inch log; place in prepared pan. Cover and let rise in warm place until doubled, about 1 hour.