Step 1

Place berries or fruit in bowl. Cover with sugar and stir.

Step 2

Cover with plastic wrap and store in refrigerator until juice exudes from fruit and starts to combine with sugar to form syrup. This may take only 5 or 6 hours, or it may need a couple of days. A longer maceration won't harm anything, so feel free to leave it in fridge longer than it might need.

Step 3

Strain syrup from fruit. Press lightly on solids to express any remaining juice/syrup. Scrape remaining sugar into syrup.

Step 4

Add vinegar and whisk to combine.

Step 5

Pour through funnel into clean bottle. Cap and shake vigorously, and mark date on bottle. Store in refrigerator.

Step 6

Check periodically. Some sugar may remain undissolved for up to a few days. Shake to combine. After about a week, acids in juice and vinegar should dissolve sugar entirely.