General Mills Inc. is changing up the recipe for its low-calorie Yoplait yogurts by dropping aspartame — an artificial sweetener that’s been dogged by critics over possible health effects. What will replace aspartame depends on where you buy your Yoplait.

The Golden Valley company said in its corporate blog this week that it would begin introducing a new Yoplait Light formula with sucralose — the artificial sweetener in Splenda — instead of aspartame. The newly reformulated yogurt will be…