Step 1

Preheat oven to 350° F. In a large bowl, whisk together the flour, sugar, baking powder and salt. Add the diced rhubarb, milk and melted butter. Stir just until combined.

Step 2

Pour the batter into a greased 9 x 13 inch baking pan. Bake for 45 minutes or until a toothpick inserted comes out clean.

Step 3

Remove from the oven and cool

Step 4

To make the butter sauce, combine the butter sugar and cream in a heavy saucepan. Bring to a boil over medium heat and boil for 1 minute stirring frequently. Remove from heat and let cool slightly.

Step 5

To serve, cut pieces of cake and serve with a generous amount of warm butter sauce. The sauce can be gently reheated on the stove or in the microwave if necessary.