This Easy Rhubarb Sauce is a 5-ingredient recipe that perfectly balances sweet and tangy flavors in just 20 minutes. Whether you're using fresh spring stalks or frozen rhubarb, this versatile sauce is an old-fashioned favorite that tastes just like the version Mom used to make. It's the ideal topping for yogurt and biscuits or even as a savory glaze for roasted meats.
In a large saucepan, stir together the diced rhubarb, water, granulated sugar, and salt over medium-high heat.
Bring the mixture to a boil, then immediately reduce the heat to medium-low. Simmer for approximately 10 minutes, stirring occasionally, until the rhubarb has broken down and reached your desired thickness.
Remove the pan from the heat and stir in the vanilla extract (if using). Allow the sauce to cool completely at room temperature before transferring it to an airtight container for refrigeration.