Place apple slices in a canning jar or glass vessel with a lid. Use equal parts brandy and vodka, using enough to cover your apples. Infuse until the liquid reaches your desired taste. I let this infuse for about 4 weeks. The combination of sweet apples and brandy gave a great apple flavor, with no need for any sugars or additional sweeteners. After infusing, strain and filter the liqueur. Bottle and enjoy!