Great gift idea! One of my kids gave me one of those mason jars filled with the dry ingredients for brownies. There are layers of sugar, cocoa, marshmallows, etc. I've seen similar jars full of cookie, muffin or cake ingredients. The recipient just has to add eggs, butter, vanilla, and/or oil, then mix and bake. His was store bought, but I was thinking maybe my class could make something like that for Mother's Day gifts, or as holiday gifts next December. Has anyone done this? Was it expensive to do? Does anybody have advice or recipes? Thanks!