Can You Freeze Banana Peppers Before Canning . But they freeze exceptionally well to use for later cooking so that is what. Place the baking sheet in the freezer until the slices are solid. How to Can Banana Pepper Rings Easy Refrigerator Pickled Peppers from www.beyerbeware.net Cut your peppers into 1/2 inch pieces and place into a bowl. Spread your leftover peppers on the cookie sheet and freeze for around 60 minutes. Turn off the heat, and let the mixture cool for about ten minutes.