Wash and core the apples. Slice into wedges or thick slices (no need to peel).
Fill a clean 1-gallon glass jar about ¼ full with the apple slices.
Add ¼ cup of the raisins.
Sprinkle in 2 teaspoons of brown sugar or honey.
Repeat the layering process—apples, raisins, and sweetener—three more times, until the jar is about ¾ full with alternating layers of apples, sugar, and raisins.
Pour in the brandy until the apples are completely covered.
Seal the jar tightly and give it a gentle shake to dissolve the sugar.
Store in a cool, dark place for at least 6 months for a deep flavor.
Strain the infused brandy through cheesecloth or a fine mesh strainer and pour into clean bottles.
Label and store in a dark cabinet or pantry.