Nutrition per serving may change if servings are adjusted.
1 cup sugar
1 tablespoon freshly grated lemon zest
1 tablespoon cornstarch
¾ cup lemon juice
2 teaspoons butter
Combine sugar, lemon zest and cornstarch in a small saucepan. Gradually whisk in lemon juice. Bring to a boil, whisking constantly; cook, still whisking, until slightly thickened, about 30 seconds. Remove from heat and whisk in butter. Serve warm.