One of the best things we can do for ourselves and our budgets is to cook more and more from scratch. When I say "make my own" any more, I truly mean make my own, as in salad dressings, bread, powdered sugar and popcorn salt.
Powdered sugar is quick and easy if you have a blender. Just put table sugar in it and blend until it's a powder. It won't be as light as commercial powdered sugar unless you add a little cornstarch. The cornstarch is to keep it from clumping after it sets for awhile, but if you make just enough for what you need at the time, you don't have to waste cornstarch.
And the popcorn salt is easy, too. A coffee mill works after a fashion but a blender does a better job. Don't overdo it. Use short pulses and check it every couple or three times. If the salt is too fine, you can easily over salt the popcorn.
There are lots of things to make from scratch and the more ways you use, the more money you save.