The Original Rice Krispies recipe calls for: 3 tablespoons butter or margarine (1/4 cup), ... light butter is not margarine - light butter is butter whipped with canola oil, which reduces the unhealthy saturated fat to some extent. https://www.thespruceeats.com/monster-rice-krispie-treats-4146453 Healthier twist on rice krispie treats. Healthier twist on rice krispie treats.