Place jumbo marshmallows on a parchment paper-lined baking sheet.

Broil for 30-45 seconds, until toasty and golden, but not charred. THIS WILL HAPPEN QUICK! DO NOT TAKE YOUR EYES OFF THE MARSHMALLOWS.

Tip: You can also toast marshmallows over a gas stove burner, with a kitchen torch, or even a fire pit if you’re feeling festive!

In a saucepan, combine the sugar, water, and salt.

Bring to a rolling boil over high heat, then reduce the heat to medium-low.

Stir the toasted marshmallows into the simmering syrup until fully melted and combined, scraping down the sides as you stir. Note the mixture will become foamy, this is normal. Continue stirring until marshmallows are fully dissolved (5-7 minutes).

Pour the syrup through a fine-mesh strainer into a heatproof jar or container.

Stir in the vanilla extract.

Store in the fridge for up to 3 weeks. Shake before each use.