I’m a big fan of several kitchen gadgets:
Electric pressure cooker: this thing does a beautiful job with dried beans, brown rice, and inexpensive beef and pork roasts. It’s been a frugality game-changer for us.
Electric water kettle, coffee grinder, and pour-over carafe: there’s no reason to drink coffee not made at home. Ours is so much tastier.
Vacuum sealer: so great for breaking down bulk packs of meat, cheese, and grains for home storage.
In-sink water filtration tap: our municipal water is safe but chlorinated; we replace this filter every 6 months for $40 a pop and have great-tasting water out of a tap all the time.