Swirled Rhubarb Bars Recipe | King Arthur Baking

Ingredients

• 1 1/2 cups (180g) diced rhubarb, frozen or fresh
• 3 tablespoons (38g) granulated sugar
• 2 tablespoons (28g) water
• 1/8 teaspoon table salt
• 1 teaspoon King Arthur Pure Vanilla Extract
• 1 teaspoon lemon juice
• 1 1/3 cups (284g) light brown sugar, packed
• 1 teaspoon table salt
• 10 tablespoons (141g) unsalted butter
• 2 large eggs
• 1 1/2 cups (180g) King Arthur Unbleached All-Purpose Flour
• 1/2 teaspoon baking powder
• 1/3 cup (57g) white chocolate, chopped