General Mills’ Pillsbury officially launched a marketing campaign to augment its products aimed at the growing number of baby boomers now becoming empty nesters. Pillsbury earlier this year began offering its frozen rolls and biscuits in resealable bags designed for easy portion control.The new “Cooking for Two” campaign supporting it includes TV ads, recipes on the Pillsbury web site, a monthly e-newsletter, and public relations outreach. The company also plans to conduct cooking demonstrations and offer samples at AARP’s National Event & Expo in Las Vegas.