This is straight out of our "Joy of Cooking" cookbook. It's one of Rob's favorite cakes. I'm making it today for the potluck that will be following the girl's play. (A friend of mine organized several girls into a play that they wrote and directed themselves.)
1 cup old-fashioned rolled oats (i use the thick rolled from wild oats.)
1 1/2 cups boiling water
1 1/3 cups all-purpose flour (i usually use freshly ground hard red wheat)
1 teaspoon baking soda
1 teaspoon ground cinnamon
1/2 teaspoon ground nutmeg
1/2 teaspoon salt
8 tablespoons (1 stick) unsalted butter
1 cup sugar (i use sucanut.)
1 cup packed light or dark brown sugar
2 large eggs
1 teaspoon vanilla
The recipe recommends making this a day or two before serving but I rarely plan that far in advance. It tastes just fine when it's fresh.
Combine the oatmeal and hot water and let them stand for 20 minutes.
All of the rest of the ingredients should be at room temp. (I can't even plan THAT far in advance. My ingredients are rarely at room temp.) Preheat the oven to 350 F. Grease one 13 x 9 inch pan.
Whisk together the flour, soda, cinnamon, nutmeg and salt. In a separate bowl beat the butter and sugars until they're "lightened in color and texture." (Given that I'm using sucanut and dark brown sugar, that never happens for me. But I beat it about 5 minutes while I grease the pan and clean up the dishes from so far.)
Add the eggs and vanilla, the the oat mixture, then the four mixture. Scrape the batter into a pan and spread evenly. Bake until a toothpick inserted in the center comes out clean, about 30 minutes. let cool briefly in the pan on a rack.
They then recommend icing it with some broiled icing recipe that I've never tried. I usually take a brick of cream cheese, beat the loofah out of it, add about 1/4 cup sucanut, beat it some more, and spread it on top of the cake. i sometimes toss a few flower petals or pieces of fruit on top to make it look nice.
(optional) When my rhubarb is going bonkers I usually pull out a bunch, chop it up and add it to the recipe. As my mom has said, "I've never been able to add too much rhubarb." I know I've added at least 2 cups and it didn't seem any more than when I had had 1 cup. It's a great way to use up rhubarb and it adds a little tartness and juiciness to the cake.