This is my variation of my mother-in-law’s recipe.
Heat oven to 350.
Read all instructions before beginning. I melt the butter for the crunch while mixing the sauce ingredients, then let the sauce cook while I mix the crunch and press it into the pan.
- 1 C butter or margarine, melted
- 2 C flour
- 1-1/2 C oats (uncooked oatmeal)
- 2 C brown sugar
- 2 tsp cinnamon
Mix all together. Divide in two equal portions. Press one half onto the bottom of a 9×13 pan. Reserve the other half of the crunch.
- 1 C sugar
- 2 Tbsp cornstarch
- 1 C water
- 1 tsp vanilla
Thoroughly mix sugar and cornstarch. When well combined, add liquids. Cook, stirring, until sauce is thick.
- 8 C rhubarb, cut into 1/2″ pieces
Spread fruit over crunch in pan. Pour sauce over rhubarb. Sprinkle remaining crunch over top. Bake at 350 degrees F for 60 minutes.