Add all ingredients to a pot. Stir it together, bring to the boil, then reduce the heat and simmer for 10 minutes, until the blueberries break down.
Place a fine mesh strainer over a bowl or jug and pour in the mixture. Press the blueberries into the strainer to extract as much blueberry syrup as possible.
Allow the mixture to cool, then pour into a sanitized jar or bottle and keep in the fridge for up to 2 weeks.
Can I use frozen blueberries? Yes! Frozen blueberries are a great choice to make this simple syrup. Just make sure they are thawed completely before cooking.
What can you use in simple syrup besides granulated sugar? You can sweeten your blueberry simple syrup with honey, agave, coconut sugar, or maple sugar in place of the granulated white sugar.
What’s the best way to freeze simple syrup? If you’re making a large batch and would like to freeze, add cooled fruit syrup to a sanitized jar or container that has a tight lid. The syrup should have enough room as the liquid will expand. It will stay fresh in the freezer for at least 2 months and can be thawed overnight in the fridge before serving.
What can I use to thicken blueberry simple syrup? If your syrup is a bit thin, a dash of cornstarch mixed with water or a dash of xanthan gum will thicken it up. Keep in mind that it will thicken as it cools!