Cost-Cutting Kitchen Remodeling Ideas. There's a new breed of homeowners redefining the way homes are built: creative individuals who thrive on the challenge of finding inexpensive materials and using them in innovative ways.
1 To freeze butter, wrap tightly in heavy-duty aluminum foil or plastic freezer wrap, or place inside a heavy-duty freezer bag. Frozen  salted butter will generally keep longer (up to 9 months for best quality) than unsalted butter (5-6 months for best quality).
In that case, you can freeze the buttermilk for later use. I use two different methods for freezing. The first is to freeze the buttermilk in an ice cube tray. Each cavity in my tray holds about 2 Tablespoons of buttermilk.