In a small pot, combine water, sugars and vanilla beans and bring mixture to a boil, stirring once or twice to help melt the sugars.
Reduce to a simmer and continue to simmer for 5 minutes.
Remove from heat and allow to cool.
Leave mixture in the pot, covered overnight to intensify the vanilla flavor.
Pour vanilla syrup into a bottle or mason jar and store in the refrigerator for up to two weeks.
Notes
You can choose to only add 1 cup sugar total, 1 ¼ cups or up to 2 cps. It's up to you. You can use all white sugar, all brown sugar or a combination of both. Agave or other sugars can be substituted.If you want a thicker syrup, you can add more sugar than water.If you want to see vanilla beans in your syrup (which I do sometimes), slice open your vanilla beans after boiling and scrape seeds out into the mixture. Place beans back in overnight. Strain into a bowl. Trust me tons of itty bitty seeds will get through, straining will however prevent the clumps from getting through.