Ingredients

• 1 cup all-purpose flour
• 1 cup brown sugar
• 0.75 cups old-fashioned oats
• 0.5 cups butter , melted
• 1 teaspoon ground cinnamon
• 4 cups chopped rhubarb

Instructions

1. 1 Preheat the oven to 350 degrees F (175 degrees C).
2. 2 Combine flour, brown sugar, oats, melted butter, and cinnamon in a medium bowl until crumbly; press into the bottom of a 9-inch square baking dish. Spread rhubarb in an even layer over crust.
3. 3 Combine water, white sugar, cornstarch, and vanilla in a small saucepan over medium-low heat; cook, stirring occasionally, until thick and clear, 5 to 10 minutes. Drizzle sauce over rhubarb.
4. 4 Bake in the preheated oven until topping is set, about 1 hour.

Nutrition per serving