1 1/2 cups all-purpose flour
3/4 cup white sugar
1/2 teaspoon salt
2 teaspoons baking powder
1/3 cup vegetable oil
1/3 cup milk
1 cup fresh or frozen cubed rhubarb
1/2 cup white sugar
1/3 cup all-purpose flour
1/4 cup butter, cubed
1 1/2 teaspoons ground cinnamon
1. Preheat oven to 375 degrees. Line muffin cups with cupcake wrappers.
2. Combine flour, sugar, salt and baking powder. Combine egg, oil and milk. Mix this with flour mixture. Fold in rhubarb. Fill muffin cups 3/4 of the way full, and sprinkle with crumb topping mixture.
3. To Make Crumb Topping: Mix together sugar, flour, butter, and cinnamon. Mix with fork, and sprinkle over muffins before baking.
4. Bake for 25 to 30 minutes in the preheated oven, or until done.