Lemon Sauce for Bread Pudding in 15 Min

Instructions:

1. In a small saucepan, whisk together the granulated sugar and cornstarch while dry to remove any clumps.
2. Slowly stir in the water and fresh lemon juice until the mixture is completely smooth.
3. Place the pan over medium heat and stir constantly with a whisk to avoid scorching the bottom.
4. Bring the mixture to a gentle boil until the sauce transitions from cloudy white to a translucent, glossy consistency; simmer for 1–2 minutes until it thickens enough to coat the back of a spoon.
5. Remove the pan from the heat immediately.
6. Whisk in the chilled butter cubes one by one until melted, then stir in the fresh lemon zest.